Introduction_to_silicates - Systematic Mineralogy Mineral...

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Systematic Mineralogy • Mineral classification schemes: - Crystal chemistry (crystallography) - Chemical composition (simplest) • True classification relies on both: - Chemistry easy to determine - X-Ray diffraction (early 20 th century) required for structure. • Chemical classification based on anions: - single anion (Cl - ) - anion group (SiO 4 4- ) Major Anionic Groups • Sulfides • Oxides (Simple, multiple, hydroxides) • Halides • Carbonates • Native elements • Sulfosalts • Nitrates • Borates • Phosphates • Sulfates • Tungstates • Silicates
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Divisions Class (anion division) Family (structural division) Group (structural division) Series (solid solution) Species (individual minerals) Varieties (substituted elements) Example: Ca-grunerite: A Ca-rich variety, of a mineral (grunerite) in the cummingtonite-grunerite series of the amphibole group of the inosilicate family of the silicate class Silicates – Introduction • The most common group of minerals forming Earth’s crust
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This note was uploaded on 07/06/2011 for the course GLY 5245 taught by Professor Staff during the Spring '11 term at University of Florida.

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Introduction_to_silicates - Systematic Mineralogy Mineral...

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