lab14 - f,f,f g,g Sodalite Na 8 (AlSiO 4 ) 6 Cl 2 Isometric...

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GY 302: Crystallography and Mineralogy Lab 14: Classes VIII: Silicates 5: Tektosilicates Drawer 14 Your task today : This is the last list of minerals that you will be responsible for in GY 302. Expect to see 6 of them embedded in our final lab exam. Mineral Formula System Specimen Quality Potassium Feldspar Group Anorthoclase (Na, K)AlSi 3 O 8 Triclinic g,g Microcline KAlSi 3 O 8 Triclinic g(x5) v. Amazonite KAlSi 3 O 8 Triclinic g Orthoclase KAlSi 3 O 8 Monoclinic p,p, g Sanidine KAlSi 3 O 8 Monoclinic g, g Plagioclase Feldspars Andesine An 30-50 Triclinic f, g Labradorite An 50-70 Triclinic g, g *Bytownite An 70-90 Triclinic f Anorthite (An) CaAl 2 Si 2 O 8 (An) Triclinic g(x4) Albite (Ab) NaAlSi 3 O 8 (An 0-10 ) Triclinic f, g(x3) Oligoclase An 10-30 Triclinic f, g(x5) Feldspathoids Lazurite (Na,Ca) 8 (AlSiO 4 ) 6 (SO 4 ,S,Cl) 2 Isometric g, g Leucite KAlSi 2 O 6 Tetragonal f, g Nepheline NaAlSiO 4 Hexagonal
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Unformatted text preview: f,f,f g,g Sodalite Na 8 (AlSiO 4 ) 6 Cl 2 Isometric f, g Quartz Group *Chert SiO 2 (multiple varieties) non crystalline g(x9+) Chalcedony SiO 2 non crystalline g(x4) *Cristobalite SiO 2 Tetragonal f, f Opal SiO 2 nH 2 O non crystalline g, g, g Quartz SiO 2 (multiple varieties) Trigonal g(x10+) Scapolite Group Scapolite (Na,Ca) 4 Al 3 Si 9 O 24 Cl Tetragonal g, g Zeolite Group Analcime NaAlSi 2 O 6 H 2 O Isometric g Chabazite CaAl 2 Si 4 O126H 2 O Trigonal g Heulandite (Na, Ca) 2-3 Al 3 (Al,Si) 2 Si 13 O 36 12H 2 O Monoclinic g, g Natrolite Na 2 Al 2 Si 3 O 10 2H 2 O Otrhorhombic g, g, g Pollucite CsAlSi 2 O 6 H 2 O Isometric g Stilbite NaCa 2 Al 5 Si 13 O 36 14H 2 O Monoclinic g(x5) p-poor, f-fair, g-good *-not on next weeks quiz/final exam...
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This note was uploaded on 02/05/2012 for the course GLY 302 taught by Professor Staff during the Spring '11 term at S. Alabama.

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