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10F_f_Minerals -...

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Mineral definition Picture 7 (1) naturally occurring (2) inorganic (3) crystalline - orderly arrangement of atoms (4) solid (5) specific range of chemical composition
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Rock  - a cohesive aggregate of minerals may be: all same mineral  or  several different minerals
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Minerals form by process of crystallization Growth of a solid from constituent atoms coming together and  bonding in the proper  chemical proportions  and  crystalline  arrangement Sodium  chloride
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Minerals made of atoms of different elements
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Composition of the Crust Element ~% by Weight Oxygen (O) 46.6 Silicon (Si) 27.7 Aluminum (Al) 8.1 Iron (Fe) 5.0 Calcium (Ca) 3.6 Sodium (Na) 2.8 Potassium (K) 2.6 Magnesium (Mg) 2.1 All others 1.5
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Minerals represented by chemical formula Halite         NaCl quartz         SiO 2 hornblende    Ca 2 (Fe,Mg) 5 AlSi 8 O 22 (OH) 2  
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Mineral Groups (one or more of these) - Silicates (K Ca Na Fe Mg Al Ti)   Si x O y - Oxides (Fe Ti Al)   O y - Carbonates  (Ca Mg Fe)   CO 3   - Sulfides (Zn Cu)   S
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Most important rock forming minerals are silicates
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