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Questions and Answers
What is the crystal structure of silicate minerals like quartz?
What is the crystal structure of silicate minerals like quartz?
How many other SiO4 tetrahedra is each individual SiO4 tetrahedron bonded to in the 3D structure?
How many other SiO4 tetrahedra is each individual SiO4 tetrahedron bonded to in the 3D structure?
What type of luster does quartz, when pure, typically exhibit?
What type of luster does quartz, when pure, typically exhibit?
What is the streak of a mineral?
What is the streak of a mineral?
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Which type of luster is described as 'having the look of a polished metal'?
Which type of luster is described as 'having the look of a polished metal'?
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What type of luster is described as 'having the look of fine, parallel fibers such as satin'?
What type of luster is described as 'having the look of fine, parallel fibers such as satin'?
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What is the common characteristic of the oxide minerals mentioned in the text?
What is the common characteristic of the oxide minerals mentioned in the text?
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Which of the following is an example of a simple oxide mineral mentioned in the text?
Which of the following is an example of a simple oxide mineral mentioned in the text?
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Which of the following is not a type of silicate mineral mentioned in the text?
Which of the following is not a type of silicate mineral mentioned in the text?
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What is the common characteristic of the sulfide minerals mentioned in the text?
What is the common characteristic of the sulfide minerals mentioned in the text?
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Which of the following is an example of a carbonate mineral mentioned in the text?
Which of the following is an example of a carbonate mineral mentioned in the text?
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What type of silicate structure is formed when two single chains share oxygen atoms?
What type of silicate structure is formed when two single chains share oxygen atoms?
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In a framework silicate structure, how many oxygen atoms does each SiO4 tetrahedron share with adjacent tetrahedrons?
In a framework silicate structure, how many oxygen atoms does each SiO4 tetrahedron share with adjacent tetrahedrons?
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Which silicate structure is formed when each SiO4 tetrahedron shares three oxygen atoms with adjacent tetrahedrons?
Which silicate structure is formed when each SiO4 tetrahedron shares three oxygen atoms with adjacent tetrahedrons?
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What is the net charge of the SiO4 tetrahedron in a silicate mineral?
What is the net charge of the SiO4 tetrahedron in a silicate mineral?
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Which type of silicate structure is the mineral olivine an example of?
Which type of silicate structure is the mineral olivine an example of?
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Which type of mineral is held together by the attraction between SiO4 tetrahedrons and other positive ions?
Which type of mineral is held together by the attraction between SiO4 tetrahedrons and other positive ions?
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Study Notes
Quartz Crystal Structure
- Quartz has a three-dimensional network structure, composed of interconnected SiO4 tetrahedra.
- Each SiO4 tetrahedron bonds with four other SiO4 tetrahedra.
Quartz Properties
- Pure quartz typically displays a vitreous luster, meaning it has a glassy appearance.
- Streak refers to the color of a mineral's powder.
- Metallic luster describes a mineral's appearance like polished metal.
- Silky luster describes a mineral's appearance like fine, parallel threads, such as satin.
Oxide Minerals
- Oxide minerals are characterized by the presence of oxygen anions (O2-) bonded to metal cations.
- Hematite (Fe2O3) is an example of a simple oxide mineral.
Silicate Minerals
- Pyroxene is a type of silicate mineral not mentioned.
Sulfide Minerals
- Sulfide minerals contain sulfur anions (S2-) bonded to metal cations.
Carbonate Minerals
- Calcite (CaCO3) is an example of a carbonate mineral.
Silicate Structures
- Double chains are formed when two single chains of SiO4 tetrahedra share oxygen atoms.
- In a framework silicate structure, each tetrahedron shares all four of its oxygen atoms with neighboring tetrahedra.
- Three-dimensional networks are formed when each SiO4 tetrahedron shares three of its oxygen atoms with adjacent tetrahedra.
Silicate Chemistry
- The net charge of the SiO4 tetrahedron is -4.
- Olivine is an example of a type of silicate with isolated SiO4 tetrahedra.
- Silicate minerals are held together by ionic bonds between the negatively charged SiO4 tetrahedra and positively charged ions.
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Description
Test your knowledge on different types of minerals including silicate minerals and oxide minerals. Learn about common minerals such as quartz, feldspar, and hematite, as well as rare species like Franklinite and Tantalite-(Fe).
