{"id":906,"date":"2017-11-27T16:30:08","date_gmt":"2017-11-27T16:30:08","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/chapter\/minerals-and-mineral-groups\/"},"modified":"2020-05-11T09:51:55","modified_gmt":"2020-05-11T09:51:55","slug":"minerals-and-mineral-groups","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/chapter\/minerals-and-mineral-groups\/","title":{"raw":"Module 11 Mineral Groups","rendered":"Module 11 Mineral Groups"},"content":{"raw":"<h2>Lesson Objectives<\/h2>\r\n<ul>\r\n \t<li>Describe the characteristics that all minerals share.<\/li>\r\n \t<li>Identify the groups in which minerals are classified and their characteristics.<\/li>\r\n<\/ul>\r\n<h2>Vocabulary<\/h2>\r\n<ul>\r\n \t<li>chemical compound<\/li>\r\n \t<li>crystal<\/li>\r\n \t<li>inorganic<\/li>\r\n \t<li>mineral<\/li>\r\n \t<li>silicates<\/li>\r\n<\/ul>\r\n<h2>Introduction<\/h2>\r\nMinerals are categorized based on their chemical composition. Owing to similarities in composition, minerals within a same group may have similar characteristics.\r\n<h2>What is a Mineral?<\/h2>\r\n<strong>Minerals<\/strong>\u00a0are everywhere!\u00a0<strong>Figure 2.1\u00a0<\/strong>below\u00a0shows some common household items and the minerals used to make them. The salt you sprinkle on food is the mineral halite. Silver in jewelry is also a mineral. Baseball bats and bicycle frames both contain minerals. Although glass is not a mineral, it is produced from the mineral quartz. Scientists have identified more than 4,000 minerals in Earth\u2019s crust. A few are common, but many are uncommon.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d828665422ab31263f759d9e19b8041f7bfe60837d9044545c6f98c50IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d828665422ab31263f759d9e19b8041f7bfe60837d9044545c6f98c50IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Silver%20and%20halite%20are%20minerals%3B%20the%20mineral%20quartz%20is%20used%20to%20make%20glass.%20\" \/><\/a>\r\n\r\n<strong>Figure 2.1: Silver and halite are minerals; the mineral quartz is used to make glass.<\/strong>\r\n\r\n<\/div>\r\nGeologists have a very specific definition for minerals. A material is characterized as a mineral if it meets all of the following traits. <strong>A mineral is an inorganic, crystalline solid. A mineral is formed through natural processes and has a definite chemical composition.<\/strong> Minerals can be identified by their characteristic physical properties such as crystalline structure, hardness, streak, and cleavage.\r\n<h3>Crystalline Solid<\/h3>\r\nMinerals are crystalline solids. A\u00a0<strong>crystal<\/strong>\u00a0is a solid in which the atoms are arranged in a regular, repeating pattern (<strong>Figure 2.2<\/strong>\u00a0 below). The pattern of atoms in different samples of the same mineral is the same. Is glass a mineral? Without a crystalline structure, even natural glass is not a mineral.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d513e4246911f14090999700164ebe0212d97980112e467bb19c6fafaIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d513e4246911f14090999700164ebe0212d97980112e467bb19c6fafaIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1#fixme\" alt=\"\" longdesc=\"#Sodium%20ions%20%28purple%20balls%29%20bond%20with%20chloride%20ions%20%28green%20balls%29%20to%20make%20table%20salt%20%28halite%29.%20All%20of%20the%20grains%20of%20salt%20that%20are%20in%20a%20salt%20shaker%20have%20this%20crystalline%20structure.%20\" \/><\/a>\r\n\r\n<strong>Figure 2.2 Sodium ions (purple balls) bond with chloride ions (green balls) to make table salt (halite). All of the grains of salt that are in a salt shaker have this crystalline structure.<\/strong>\r\n\r\n<\/div>\r\n<h3>Inorganic Substances<\/h3>\r\nOrganic substances are the carbon-based compounds made by living creatures and include proteins, carbohydrates, and oils.\u00a0<strong>Inorganic\u00a0<\/strong>substances have a structure that is not characteristic of living bodies. Coal is made of plant and animal remains. Is it a mineral? Coal is a classified as a sedimentary rock but is not a mineral.\r\n<h3>Natural Processes<\/h3>\r\nMinerals are made by natural processes, those that occur in or on Earth. A diamond created deep in Earth\u2019s crust is a mineral. Is a diamond created in a laboratory by placing carbon under high pressures a mineral?\u00a0<em>No.<\/em>\u00a0Do not buy a laboratory-made \u201cdiamond\u201d for jewelry without realizing it is not technically a mineral.\r\n<h3>Chemical Composition<\/h3>\r\nNearly all (98.5%) of Earth\u2019s crust is made up of only <strong>eight elements<\/strong> \u2013<strong> oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium<\/strong> \u2013 and these are the elements that make up most minerals.\r\n\r\nAll minerals have a specific chemical composition. The mineral silver is made up of only silver atoms and diamond is made only of carbon atoms, but most minerals are made up of\u00a0<strong>chemical compounds<\/strong>. Each mineral has its own chemical formula. Halite, pictured in the\u00a0<strong>Figure 2.2\u00a0<\/strong><a href=\"#x-ck12-SFMtRVMtMDMtMDItMy1NaW5lcmFsLWV4YW1wbGVzLXNpbHZlci1oYWxpdGUtcXVhcnR6\">above<\/a>, is NaCl (sodium chloride). Quartz is always made of two oxygen atoms bonded to a silicon atom, SiO<sub>2<\/sub>. If a mineral contains any other elements in its crystal structure, it's not quartz.\r\n\r\nA hard mineral containing covalently bonded carbon is diamond, but a softer mineral that also contains calcium and oxygen along with carbon is calcite (<strong>Figure<\/strong>\u00a0 below).\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dc603cd21a4fe8daa7c772f2e1d419f5dbb916b3f8f623a763d74f8abIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dc603cd21a4fe8daa7c772f2e1d419f5dbb916b3f8f623a763d74f8abIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1#fixme\" alt=\"\" longdesc=\"#The%20structure%20of%20calcite%20shows%20the%20relationship%20of%20calcium%20%28Ca%29%2C%20carbon%20%28C%29%2C%20and%20oxygen%20%28O%29.%20\" \/><\/a>\r\n\r\nThe structure of calcite shows the relationship of calcium (Ca), carbon (C), and oxygen (O).\r\n\r\n<\/div>\r\nSome minerals have a range of chemical composition. Olivine always has silicon and oxygen as well as iron or magnesium or both, (Mg, Fe)<sub>2<\/sub>SiO<sub>4<\/sub>.\r\n<h3>Physical Properties<\/h3>\r\nThe physical properties of minerals include:\r\n<ul>\r\n \t<li>Color: the color of the mineral.<\/li>\r\n \t<li>Streak: the color of the mineral\u2019s powder.<\/li>\r\n \t<li>Luster: the way light reflects off the mineral\u2019s surface.<\/li>\r\n \t<li>Specific gravity: how heavy the mineral is relative to the same volume of water.<\/li>\r\n \t<li>Cleavage: the mineral\u2019s tendency to break along flat surfaces.<\/li>\r\n \t<li>Fracture: the pattern in which a mineral breaks.<\/li>\r\n \t<li>Hardness: what minerals it can scratch and what minerals can scratch it.<\/li>\r\n<\/ul>\r\nHow physical properties are used to identify minerals is described in the lesson on\u00a0<em>Mineral Formation<\/em>.\r\n<h2>Mineral Groups<\/h2>\r\nMinerals are divided into groups based on chemical composition. Most minerals fit into one of eight mineral groups.\r\n<h3>Silicate Minerals<\/h3>\r\nThe roughly 1,000 silicate minerals make up over 90% of Earth's crust.\u00a0<strong>Silicates<\/strong>\u00a0are by far the largest mineral group. Feldspar and quartz are the two most common silicate minerals. Both are extremely common rock-forming minerals.\r\n\r\nThe basic building block for all silicate minerals is the silica tetrahedron, which is illustrated in\u00a0<strong>Figure<\/strong>\u00a0 below. To create the wide variety of silicate minerals, this pyramid-shaped structure is often bound to other elements, such as calcium, iron, and magnesium.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d6c435bfe78c804759e643068bc419d014e911cbbc766bb1fbfee88b6IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d6c435bfe78c804759e643068bc419d014e911cbbc766bb1fbfee88b6IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#One%20silicon%20atom%20bonds%20to%20four%20oxygen%20atoms%20to%20form%20a%20silica%20tetrahedron.%20\" \/><\/a>\r\n\r\nOne silicon atom bonds to four oxygen atoms to form a silica tetrahedron.\r\n\r\n<\/div>\r\nSilica tetrahedrons combine together in six different ways to create different types of silicates (<strong>Figure<\/strong>\u00a0 below). Tetrahedrons can stand alone, form connected circles called rings, link into single and double chains, form large flat sheets of pyramids, or join in three dimensions.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d0f9f57a4fecbe56eeb8b2e93b8016bd88ab66467feb88ea00ef81b2fIMAGEIMAGE.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163003\/sm_f-d0f9f57a4fecbe56eeb8b2e93b8016bd88ab66467feb88ea00ef81b2fIMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#The%20different%20ways%20that%20silica%20tetrahedrons%20can%20join%20together%20cause%20these%20two%20minerals%20to%20look%20very%20different.%20\" \/><\/a>\r\n\r\nThe different ways that silica tetrahedrons can join together cause these two minerals to look very different.\r\n\r\n<\/div>\r\n<h3>Native Elements<\/h3>\r\nNative elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable. Gold, silver, sulfur, and diamond are examples of native elements.\r\n<h3>Carbonates<\/h3>\r\nThe basic carbonate structure is one carbon atom bonded to three oxygen atoms. Carbonates include other elements, such as calcium, iron, and copper. Calcite (CaCO<sub>3<\/sub>) is the most common carbonate mineral (<strong>Figure<\/strong>\u00a0 below).\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d69dd45435807a4ed6c5c96027679086edeb7566c01c78ecaae7a838dIMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d69dd45435807a4ed6c5c96027679086edeb7566c01c78ecaae7a838dIMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Calcite%20is%20the%20most%20common%20carbonate%20mineral.%20\" \/><\/a>\r\n\r\nCalcite is the most common carbonate mineral.\r\n\r\n<\/div>\r\nAzurite and malachite, shown in the\u00a0<strong>Figure<\/strong>\u00a0 below, are carbonates that contain copper instead of calcium.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dcb3f4685171ff3efe9d32932f0f7d3dfe4624ce4481266d9d5e97b71IMAGEIMAGE.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163005\/sm_f-dcb3f4685171ff3efe9d32932f0f7d3dfe4624ce4481266d9d5e97b71IMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#Two%20carbonate%20minerals%3A%20%28a%29%20deep%20blue%20azurite%20and%20%28b%29%20opaque%20green%20malachite.%20\" \/><\/a>\r\n\r\nTwo carbonate minerals: (a) deep blue azurite and (b) opaque green malachite.\r\n\r\n<\/div>\r\n<h3>Halides<\/h3>\r\nHalide minerals are salts that form when salt water evaporates. Halite is a halide mineral, but table salt is not the only halide. The chemical elements known as the halogens (fluorine, chlorine, bromine, or iodine) bond with various metallic atoms to make halide minerals (see<strong>Figure<\/strong>\u00a0 below).\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-df81cae9de8b1f355ae3b87f7401aabc691c78060a0b5505a52aba8d2IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"Fluorite\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-df81cae9de8b1f355ae3b87f7401aabc691c78060a0b5505a52aba8d2IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"Fluorite\" longdesc=\"#Fluorite%20is%20a%20halide%20containing%20calcium%20and%20fluorine.%20\" \/><\/a>\r\n\r\nFluorite is a halide containing calcium and fluorine.\r\n\r\n<\/div>\r\n<h3>Oxides<\/h3>\r\nOxides contain one or two metal elements combined with oxygen. Many important metals are found as oxides. Hematite (Fe<sub>2<\/sub>O<sub>3<\/sub>), with two iron atoms to three oxygen atoms, and magnetite (Fe<sub>3<\/sub>O<sub>4<\/sub>) (<strong>Figure<\/strong>\u00a0 below), with three iron atoms to four oxygen atoms, are both iron oxides.\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-de6869a14798010e39a4c19900e7eca435908867cfd8aad81c72f6641IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-de6869a14798010e39a4c19900e7eca435908867cfd8aad81c72f6641IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Magnetite%20is%20the%20most%20magnetic%20mineral.%20Magnetite%20attracts%20or%20repels%20other%20magnets.%20\" \/><\/a>\r\n\r\nMagnetite is the most magnetic mineral. Magnetite attracts or repels other magnets.\r\n\r\n<\/div>\r\n<h3>Phosphates<\/h3>\r\nPhosphate minerals are similar in atomic structure to the silicate minerals. In the phosphates, phosphorus, arsenic, or vanadium bond to oxygen to form a tetrahedra. There are many different minerals in the phosphate group, but most are rare (<strong>Figure<\/strong>\u00a0 below).\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d63fcde137af604ba90a51cae0f4914e608992c1be015104f30dc7dc9IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d63fcde137af604ba90a51cae0f4914e608992c1be015104f30dc7dc9IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Turquoise%20is%20a%20phosphate%20mineral%20containing%20copper%2C%20aluminum%2C%20and%20phosphorus.%20\" \/><\/a>\r\n\r\nTurquoise is a phosphate mineral containing copper, aluminum, and phosphorus.\r\n\r\n<\/div>\r\n<h3>Sulfates<\/h3>\r\nSulfate minerals contain sulfur atoms bonded to oxygen atoms. Like halides, they form where salt water evaporates. The sulfate group contains many different minerals, but only a few are common.\r\n\r\nGypsum is a common sulfate with a variety of appearances (<strong>Figure<\/strong>\u00a0 below). Some gigantic 11-meter gypsum crystals have been found. That is about as long as a school bus!\r\n<div>\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d15e45d3985aa6fd593f93de86a84ce5b9e48e84d4b902a15b003160fIMAGEIMAGE.1\"><img title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163007\/sm_f-d15e45d3985aa6fd593f93de86a84ce5b9e48e84d4b902a15b003160fIMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#Although%20the%20orange%20crystals%20on%20the%20left%20looks%20nothing%20like%20the%20white%20sands%20on%20the%20right%2C%20both%20the%20crystals%20and%20sands%20are%20gypsum.%20\" \/><\/a>\r\n\r\nAlthough the orange crystals on the left looks nothing like the white sands on the right, both the crystals and sands are gypsum.\r\n\r\n<\/div>\r\n<h3>Sulfides<\/h3>\r\nSulfides are formed when metallic elements combine with sulfur. Unlike sulfates, sulfides do not contain oxygen. Pyrite, or iron sulfide, is a common sulfide mineral known as\u00a0<em>fool\u2019s gold<\/em>. People may mistake pyrite for gold because the two minerals are shiny, metallic, and yellow in color.\r\n<h2>Lesson Summary<\/h2>\r\n<ul>\r\n \t<li>For a substance to be a mineral, it must be a naturally occurring, inorganic, crystalline solid that has a characteristic chemical composition and crystal structure.<\/li>\r\n \t<li>The atoms in minerals are arranged in regular, repeating patterns that can be used to identify that mineral.<\/li>\r\n \t<li>Minerals are divided into groups based on their chemical composition.<\/li>\r\n \t<li>The chemical feature of each groups is: native elements \u2013 only one element; silicates \u2013 silica tetrahedron; phosphates \u2013 phosphate tetrahedron; carbonates \u2013 one carbon atom with three oxygen atoms; halides \u2013 a halogen bonded with a metallic atom; oxides \u2013 a metal combined with oxygen; sulfates \u2013 sulfur and oxygen; sulfides \u2013 metal with sulfur, no oxygen.<\/li>\r\n<\/ul>\r\n<h2>Review Questions<\/h2>\r\n<ol>\r\n \t<li>What is a crystal?<\/li>\r\n \t<li>Which elements do all silicate minerals contain?<\/li>\r\n \t<li>Obsidian is a glass that forms when lava cools so quickly that the atoms do not have a chance to arrange themselves in crystals. Is obsidian a crystal? Explain your reasoning.<\/li>\r\n \t<li>What are the eight major mineral groups?<\/li>\r\n \t<li>What is the same about all minerals in the silicate group? What is different about them?<\/li>\r\n \t<li>One sample has a chemical composition with a ratio of two iron atoms to three oxygen atoms. Another sample has a chemical composition with a ratio of three iron atoms to four oxygen atoms. They contain the same elements: Are they the same mineral?<\/li>\r\n \t<li>How does the native elements mineral group differ from all of the other mineral groups?<\/li>\r\n \t<li>On a trip to the natural history museum you find two minerals that are similar in color. You can see from their chemical formulas that one mineral contains the elements zinc, carbon, and oxygen. The other mineral contains the elements zinc, silicon, oxygen, and hydrogen. Your friend tells you that the minerals are in the same mineral group. Do you agree? Explain your reasoning.<\/li>\r\n<\/ol>\r\n<h2>Further Reading \/ Supplemental Links<\/h2>\r\n<ul>\r\n \t<li>The Definition of a Mineral:\u00a0<a href=\"http:\/\/www.minsocam.org\/msa\/ima\/ima98(04).pdf\">http:\/\/www.minsocam.org\/msa\/ima\/ima98(04).pdf<\/a>.<\/li>\r\n \t<li>Mineral Identification:\u00a0<a href=\"http:\/\/geology.csupomona.edu\/alert\/mineral\/minerals.htm\">http:\/\/geology.csupomona.edu\/alert\/mineral\/minerals.htm<\/a>.<\/li>\r\n \t<li>Dana Classification of Minerals:\u00a0<a href=\"http:\/\/webmineral.com\/danaclass.shtml\">http:\/\/webmineral.com\/danaclass.shtml<\/a>.<\/li>\r\n \t<li>A Lot of Different Minerals:\u00a0<a href=\"http:\/\/hyperphysics.phy-astr.gsu.edu\/hbase\/geophys\/mineral.html#c1\">http:\/\/hyperphysics.phy-astr.gsu.edu\/hbase\/geophys\/mineral.html#c1<\/a>.<\/li>\r\n \t<li>Mineral Groups:\u00a0<a href=\"http:\/\/mineral.galleries.com\/minerals\/silicate\/class.htm\">http:\/\/mineral.galleries.com\/minerals\/silicate\/class.htm<\/a>.<\/li>\r\n<\/ul>\r\n<h2>Points to Consider<\/h2>\r\n<ul>\r\n \t<li>Why is obsidian, a natural glass that forms from cooling lava, not a mineral?<\/li>\r\n \t<li>Why are diamonds made in a laboratory not minerals?<\/li>\r\n \t<li>Is coal, formed mostly from decayed plants, a mineral? Is it a rock?<\/li>\r\n \t<li>Artists used to grind up the mineral azurite to make colorful pigments for paints. Is the powdered azurite still crystalline?<\/li>\r\n<\/ul>","rendered":"<h2>Lesson Objectives<\/h2>\n<ul>\n<li>Describe the characteristics that all minerals share.<\/li>\n<li>Identify the groups in which minerals are classified and their characteristics.<\/li>\n<\/ul>\n<h2>Vocabulary<\/h2>\n<ul>\n<li>chemical compound<\/li>\n<li>crystal<\/li>\n<li>inorganic<\/li>\n<li>mineral<\/li>\n<li>silicates<\/li>\n<\/ul>\n<h2>Introduction<\/h2>\n<p>Minerals are categorized based on their chemical composition. Owing to similarities in composition, minerals within a same group may have similar characteristics.<\/p>\n<h2>What is a Mineral?<\/h2>\n<p><strong>Minerals<\/strong>\u00a0are everywhere!\u00a0<strong>Figure 2.1\u00a0<\/strong>below\u00a0shows some common household items and the minerals used to make them. The salt you sprinkle on food is the mineral halite. Silver in jewelry is also a mineral. Baseball bats and bicycle frames both contain minerals. Although glass is not a mineral, it is produced from the mineral quartz. Scientists have identified more than 4,000 minerals in Earth\u2019s crust. A few are common, but many are uncommon.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d828665422ab31263f759d9e19b8041f7bfe60837d9044545c6f98c50IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d828665422ab31263f759d9e19b8041f7bfe60837d9044545c6f98c50IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Silver%20and%20halite%20are%20minerals%3B%20the%20mineral%20quartz%20is%20used%20to%20make%20glass.%20\" \/><\/a><\/p>\n<p><strong>Figure 2.1: Silver and halite are minerals; the mineral quartz is used to make glass.<\/strong><\/p>\n<\/div>\n<p>Geologists have a very specific definition for minerals. A material is characterized as a mineral if it meets all of the following traits. <strong>A mineral is an inorganic, crystalline solid. A mineral is formed through natural processes and has a definite chemical composition.<\/strong> Minerals can be identified by their characteristic physical properties such as crystalline structure, hardness, streak, and cleavage.<\/p>\n<h3>Crystalline Solid<\/h3>\n<p>Minerals are crystalline solids. A\u00a0<strong>crystal<\/strong>\u00a0is a solid in which the atoms are arranged in a regular, repeating pattern (<strong>Figure 2.2<\/strong>\u00a0 below). The pattern of atoms in different samples of the same mineral is the same. Is glass a mineral? Without a crystalline structure, even natural glass is not a mineral.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d513e4246911f14090999700164ebe0212d97980112e467bb19c6fafaIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d513e4246911f14090999700164ebe0212d97980112e467bb19c6fafaIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1#fixme\" alt=\"\" longdesc=\"#Sodium%20ions%20%28purple%20balls%29%20bond%20with%20chloride%20ions%20%28green%20balls%29%20to%20make%20table%20salt%20%28halite%29.%20All%20of%20the%20grains%20of%20salt%20that%20are%20in%20a%20salt%20shaker%20have%20this%20crystalline%20structure.%20\" \/><\/a><\/p>\n<p><strong>Figure 2.2 Sodium ions (purple balls) bond with chloride ions (green balls) to make table salt (halite). All of the grains of salt that are in a salt shaker have this crystalline structure.<\/strong><\/p>\n<\/div>\n<h3>Inorganic Substances<\/h3>\n<p>Organic substances are the carbon-based compounds made by living creatures and include proteins, carbohydrates, and oils.\u00a0<strong>Inorganic\u00a0<\/strong>substances have a structure that is not characteristic of living bodies. Coal is made of plant and animal remains. Is it a mineral? Coal is a classified as a sedimentary rock but is not a mineral.<\/p>\n<h3>Natural Processes<\/h3>\n<p>Minerals are made by natural processes, those that occur in or on Earth. A diamond created deep in Earth\u2019s crust is a mineral. Is a diamond created in a laboratory by placing carbon under high pressures a mineral?\u00a0<em>No.<\/em>\u00a0Do not buy a laboratory-made \u201cdiamond\u201d for jewelry without realizing it is not technically a mineral.<\/p>\n<h3>Chemical Composition<\/h3>\n<p>Nearly all (98.5%) of Earth\u2019s crust is made up of only <strong>eight elements<\/strong> \u2013<strong> oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium<\/strong> \u2013 and these are the elements that make up most minerals.<\/p>\n<p>All minerals have a specific chemical composition. The mineral silver is made up of only silver atoms and diamond is made only of carbon atoms, but most minerals are made up of\u00a0<strong>chemical compounds<\/strong>. Each mineral has its own chemical formula. Halite, pictured in the\u00a0<strong>Figure 2.2\u00a0<\/strong><a href=\"#x-ck12-SFMtRVMtMDMtMDItMy1NaW5lcmFsLWV4YW1wbGVzLXNpbHZlci1oYWxpdGUtcXVhcnR6\">above<\/a>, is NaCl (sodium chloride). Quartz is always made of two oxygen atoms bonded to a silicon atom, SiO<sub>2<\/sub>. If a mineral contains any other elements in its crystal structure, it&#8217;s not quartz.<\/p>\n<p>A hard mineral containing covalently bonded carbon is diamond, but a softer mineral that also contains calcium and oxygen along with carbon is calcite (<strong>Figure<\/strong>\u00a0 below).<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dc603cd21a4fe8daa7c772f2e1d419f5dbb916b3f8f623a763d74f8abIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dc603cd21a4fe8daa7c772f2e1d419f5dbb916b3f8f623a763d74f8abIMAGE_THUMB_LARGEIMAGE_THUMB_LARGE.1#fixme\" alt=\"\" longdesc=\"#The%20structure%20of%20calcite%20shows%20the%20relationship%20of%20calcium%20%28Ca%29%2C%20carbon%20%28C%29%2C%20and%20oxygen%20%28O%29.%20\" \/><\/a><\/p>\n<p>The structure of calcite shows the relationship of calcium (Ca), carbon (C), and oxygen (O).<\/p>\n<\/div>\n<p>Some minerals have a range of chemical composition. Olivine always has silicon and oxygen as well as iron or magnesium or both, (Mg, Fe)<sub>2<\/sub>SiO<sub>4<\/sub>.<\/p>\n<h3>Physical Properties<\/h3>\n<p>The physical properties of minerals include:<\/p>\n<ul>\n<li>Color: the color of the mineral.<\/li>\n<li>Streak: the color of the mineral\u2019s powder.<\/li>\n<li>Luster: the way light reflects off the mineral\u2019s surface.<\/li>\n<li>Specific gravity: how heavy the mineral is relative to the same volume of water.<\/li>\n<li>Cleavage: the mineral\u2019s tendency to break along flat surfaces.<\/li>\n<li>Fracture: the pattern in which a mineral breaks.<\/li>\n<li>Hardness: what minerals it can scratch and what minerals can scratch it.<\/li>\n<\/ul>\n<p>How physical properties are used to identify minerals is described in the lesson on\u00a0<em>Mineral Formation<\/em>.<\/p>\n<h2>Mineral Groups<\/h2>\n<p>Minerals are divided into groups based on chemical composition. Most minerals fit into one of eight mineral groups.<\/p>\n<h3>Silicate Minerals<\/h3>\n<p>The roughly 1,000 silicate minerals make up over 90% of Earth&#8217;s crust.\u00a0<strong>Silicates<\/strong>\u00a0are by far the largest mineral group. Feldspar and quartz are the two most common silicate minerals. Both are extremely common rock-forming minerals.<\/p>\n<p>The basic building block for all silicate minerals is the silica tetrahedron, which is illustrated in\u00a0<strong>Figure<\/strong>\u00a0 below. To create the wide variety of silicate minerals, this pyramid-shaped structure is often bound to other elements, such as calcium, iron, and magnesium.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d6c435bfe78c804759e643068bc419d014e911cbbc766bb1fbfee88b6IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d6c435bfe78c804759e643068bc419d014e911cbbc766bb1fbfee88b6IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#One%20silicon%20atom%20bonds%20to%20four%20oxygen%20atoms%20to%20form%20a%20silica%20tetrahedron.%20\" \/><\/a><\/p>\n<p>One silicon atom bonds to four oxygen atoms to form a silica tetrahedron.<\/p>\n<\/div>\n<p>Silica tetrahedrons combine together in six different ways to create different types of silicates (<strong>Figure<\/strong>\u00a0 below). Tetrahedrons can stand alone, form connected circles called rings, link into single and double chains, form large flat sheets of pyramids, or join in three dimensions.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d0f9f57a4fecbe56eeb8b2e93b8016bd88ab66467feb88ea00ef81b2fIMAGEIMAGE.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163003\/sm_f-d0f9f57a4fecbe56eeb8b2e93b8016bd88ab66467feb88ea00ef81b2fIMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#The%20different%20ways%20that%20silica%20tetrahedrons%20can%20join%20together%20cause%20these%20two%20minerals%20to%20look%20very%20different.%20\" \/><\/a><\/p>\n<p>The different ways that silica tetrahedrons can join together cause these two minerals to look very different.<\/p>\n<\/div>\n<h3>Native Elements<\/h3>\n<p>Native elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable. Gold, silver, sulfur, and diamond are examples of native elements.<\/p>\n<h3>Carbonates<\/h3>\n<p>The basic carbonate structure is one carbon atom bonded to three oxygen atoms. Carbonates include other elements, such as calcium, iron, and copper. Calcite (CaCO<sub>3<\/sub>) is the most common carbonate mineral (<strong>Figure<\/strong>\u00a0 below).<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d69dd45435807a4ed6c5c96027679086edeb7566c01c78ecaae7a838dIMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d69dd45435807a4ed6c5c96027679086edeb7566c01c78ecaae7a838dIMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Calcite%20is%20the%20most%20common%20carbonate%20mineral.%20\" \/><\/a><\/p>\n<p>Calcite is the most common carbonate mineral.<\/p>\n<\/div>\n<p>Azurite and malachite, shown in the\u00a0<strong>Figure<\/strong>\u00a0 below, are carbonates that contain copper instead of calcium.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-dcb3f4685171ff3efe9d32932f0f7d3dfe4624ce4481266d9d5e97b71IMAGEIMAGE.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163005\/sm_f-dcb3f4685171ff3efe9d32932f0f7d3dfe4624ce4481266d9d5e97b71IMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#Two%20carbonate%20minerals%3A%20%28a%29%20deep%20blue%20azurite%20and%20%28b%29%20opaque%20green%20malachite.%20\" \/><\/a><\/p>\n<p>Two carbonate minerals: (a) deep blue azurite and (b) opaque green malachite.<\/p>\n<\/div>\n<h3>Halides<\/h3>\n<p>Halide minerals are salts that form when salt water evaporates. Halite is a halide mineral, but table salt is not the only halide. The chemical elements known as the halogens (fluorine, chlorine, bromine, or iodine) bond with various metallic atoms to make halide minerals (see<strong>Figure<\/strong>\u00a0 below).<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-df81cae9de8b1f355ae3b87f7401aabc691c78060a0b5505a52aba8d2IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"Fluorite\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-df81cae9de8b1f355ae3b87f7401aabc691c78060a0b5505a52aba8d2IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"Fluorite\" longdesc=\"#Fluorite%20is%20a%20halide%20containing%20calcium%20and%20fluorine.%20\" \/><\/a><\/p>\n<p>Fluorite is a halide containing calcium and fluorine.<\/p>\n<\/div>\n<h3>Oxides<\/h3>\n<p>Oxides contain one or two metal elements combined with oxygen. Many important metals are found as oxides. Hematite (Fe<sub>2<\/sub>O<sub>3<\/sub>), with two iron atoms to three oxygen atoms, and magnetite (Fe<sub>3<\/sub>O<sub>4<\/sub>) (<strong>Figure<\/strong>\u00a0 below), with three iron atoms to four oxygen atoms, are both iron oxides.<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-de6869a14798010e39a4c19900e7eca435908867cfd8aad81c72f6641IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-de6869a14798010e39a4c19900e7eca435908867cfd8aad81c72f6641IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Magnetite%20is%20the%20most%20magnetic%20mineral.%20Magnetite%20attracts%20or%20repels%20other%20magnets.%20\" \/><\/a><\/p>\n<p>Magnetite is the most magnetic mineral. Magnetite attracts or repels other magnets.<\/p>\n<\/div>\n<h3>Phosphates<\/h3>\n<p>Phosphate minerals are similar in atomic structure to the silicate minerals. In the phosphates, phosphorus, arsenic, or vanadium bond to oxygen to form a tetrahedra. There are many different minerals in the phosphate group, but most are rare (<strong>Figure<\/strong>\u00a0 below).<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d63fcde137af604ba90a51cae0f4914e608992c1be015104f30dc7dc9IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d63fcde137af604ba90a51cae0f4914e608992c1be015104f30dc7dc9IMAGE_THUMB_POSTCARDIMAGE_THUMB_POSTCARD.1#fixme\" alt=\"\" longdesc=\"#Turquoise%20is%20a%20phosphate%20mineral%20containing%20copper%2C%20aluminum%2C%20and%20phosphorus.%20\" \/><\/a><\/p>\n<p>Turquoise is a phosphate mineral containing copper, aluminum, and phosphorus.<\/p>\n<\/div>\n<h3>Sulfates<\/h3>\n<p>Sulfate minerals contain sulfur atoms bonded to oxygen atoms. Like halides, they form where salt water evaporates. The sulfate group contains many different minerals, but only a few are common.<\/p>\n<p>Gypsum is a common sulfate with a variety of appearances (<strong>Figure<\/strong>\u00a0 below). Some gigantic 11-meter gypsum crystals have been found. That is about as long as a school bus!<\/p>\n<div>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/candimgs\/RxML8u\/f-d15e45d3985aa6fd593f93de86a84ce5b9e48e84d4b902a15b003160fIMAGEIMAGE.1\"><img decoding=\"async\" title=\"\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/2548\/2017\/11\/27163007\/sm_f-d15e45d3985aa6fd593f93de86a84ce5b9e48e84d4b902a15b003160fIMAGEIMAGE.1.jpg\" alt=\"\" longdesc=\"#Although%20the%20orange%20crystals%20on%20the%20left%20looks%20nothing%20like%20the%20white%20sands%20on%20the%20right%2C%20both%20the%20crystals%20and%20sands%20are%20gypsum.%20\" \/><\/a><\/p>\n<p>Although the orange crystals on the left looks nothing like the white sands on the right, both the crystals and sands are gypsum.<\/p>\n<\/div>\n<h3>Sulfides<\/h3>\n<p>Sulfides are formed when metallic elements combine with sulfur. Unlike sulfates, sulfides do not contain oxygen. Pyrite, or iron sulfide, is a common sulfide mineral known as\u00a0<em>fool\u2019s gold<\/em>. People may mistake pyrite for gold because the two minerals are shiny, metallic, and yellow in color.<\/p>\n<h2>Lesson Summary<\/h2>\n<ul>\n<li>For a substance to be a mineral, it must be a naturally occurring, inorganic, crystalline solid that has a characteristic chemical composition and crystal structure.<\/li>\n<li>The atoms in minerals are arranged in regular, repeating patterns that can be used to identify that mineral.<\/li>\n<li>Minerals are divided into groups based on their chemical composition.<\/li>\n<li>The chemical feature of each groups is: native elements \u2013 only one element; silicates \u2013 silica tetrahedron; phosphates \u2013 phosphate tetrahedron; carbonates \u2013 one carbon atom with three oxygen atoms; halides \u2013 a halogen bonded with a metallic atom; oxides \u2013 a metal combined with oxygen; sulfates \u2013 sulfur and oxygen; sulfides \u2013 metal with sulfur, no oxygen.<\/li>\n<\/ul>\n<h2>Review Questions<\/h2>\n<ol>\n<li>What is a crystal?<\/li>\n<li>Which elements do all silicate minerals contain?<\/li>\n<li>Obsidian is a glass that forms when lava cools so quickly that the atoms do not have a chance to arrange themselves in crystals. Is obsidian a crystal? Explain your reasoning.<\/li>\n<li>What are the eight major mineral groups?<\/li>\n<li>What is the same about all minerals in the silicate group? What is different about them?<\/li>\n<li>One sample has a chemical composition with a ratio of two iron atoms to three oxygen atoms. Another sample has a chemical composition with a ratio of three iron atoms to four oxygen atoms. They contain the same elements: Are they the same mineral?<\/li>\n<li>How does the native elements mineral group differ from all of the other mineral groups?<\/li>\n<li>On a trip to the natural history museum you find two minerals that are similar in color. You can see from their chemical formulas that one mineral contains the elements zinc, carbon, and oxygen. The other mineral contains the elements zinc, silicon, oxygen, and hydrogen. Your friend tells you that the minerals are in the same mineral group. Do you agree? Explain your reasoning.<\/li>\n<\/ol>\n<h2>Further Reading \/ Supplemental Links<\/h2>\n<ul>\n<li>The Definition of a Mineral:\u00a0<a href=\"http:\/\/www.minsocam.org\/msa\/ima\/ima98(04).pdf\">http:\/\/www.minsocam.org\/msa\/ima\/ima98(04).pdf<\/a>.<\/li>\n<li>Mineral Identification:\u00a0<a href=\"http:\/\/geology.csupomona.edu\/alert\/mineral\/minerals.htm\">http:\/\/geology.csupomona.edu\/alert\/mineral\/minerals.htm<\/a>.<\/li>\n<li>Dana Classification of Minerals:\u00a0<a href=\"http:\/\/webmineral.com\/danaclass.shtml\">http:\/\/webmineral.com\/danaclass.shtml<\/a>.<\/li>\n<li>A Lot of Different Minerals:\u00a0<a href=\"http:\/\/hyperphysics.phy-astr.gsu.edu\/hbase\/geophys\/mineral.html#c1\">http:\/\/hyperphysics.phy-astr.gsu.edu\/hbase\/geophys\/mineral.html#c1<\/a>.<\/li>\n<li>Mineral Groups:\u00a0<a href=\"http:\/\/mineral.galleries.com\/minerals\/silicate\/class.htm\">http:\/\/mineral.galleries.com\/minerals\/silicate\/class.htm<\/a>.<\/li>\n<\/ul>\n<h2>Points to Consider<\/h2>\n<ul>\n<li>Why is obsidian, a natural glass that forms from cooling lava, not a mineral?<\/li>\n<li>Why are diamonds made in a laboratory not minerals?<\/li>\n<li>Is coal, formed mostly from decayed plants, a mineral? Is it a rock?<\/li>\n<li>Artists used to grind up the mineral azurite to make colorful pigments for paints. Is the powdered azurite still crystalline?<\/li>\n<\/ul>\n","protected":false},"author":17,"menu_order":4,"template":"","meta":{"_candela_citation":"[]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-906","chapter","type-chapter","status-publish","hentry"],"part":1079,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapters\/906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/wp\/v2\/users\/17"}],"version-history":[{"count":2,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapters\/906\/revisions"}],"predecessor-version":[{"id":1980,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapters\/906\/revisions\/1980"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/parts\/1079"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapters\/906\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/wp\/v2\/media?parent=906"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/pressbooks\/v2\/chapter-type?post=906"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/wp\/v2\/contributor?post=906"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/ivytech-sci111\/wp-json\/wp\/v2\/license?post=906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}