lab10b - 2 MgAl 2(SiO 4(Si 2 O 7(OH)2·H 2 O Monoclinic p p...

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GY 302: Crystallography and Mineralogy Lab 10b: Classes VIII: Silicates 2: Soro and Cyclosilicates Drawer 10 Your task today : This is the list of minerals that you will be responsible for the next lab. The soro and cyclosilicates are not that numerous in number (we consider only a handful), but remember that two of these “minerals” are actually groups. Expect some variety in physical characteristics (especially “tourmaline”). Mineral Formula System Specimen Quality SOROSILICATES Allanite (Ca,Ce) 2 (Fe,Fe)Al 2 O(SiO 4 )(Si 2 O 7 )(OH) Monoclinic g, g Clinozoisite Ca 2 Al 3 O(SiO 4 )(Si 2 O 7 )(OH) Monoclinic g Epidote Ca 2 (Al,Fe)Al 2 O(SiO 4 )(Si 2 O 7 )(OH) Monoclinic p, f, g (x4) *Hemimorphite Zn 4 Si 2 O 7 (OH) 2 ·(H 2 O) Orthorhombic p, f, g, g Lawsonite CaAl 2 SiO 7 (OH) 2 ·H 2 O Orthorhombic f, g *Pumpellyite Ca
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Unformatted text preview: 2 MgAl 2 (SiO 4 )(Si 2 O 7 )(OH)2·H 2 O Monoclinic p, p Vesuvianite Ca 10 Mg 2 Al 4 (SiO 4 ) 5 (Si 2 O 7 ) 2 (OH) 4 Tetragonal g, g, g Zoisite Ca 2 Al 3 O(SiO 4 )(Si 2 O 7 )(OH) Orthorhombic f, g, g CYCLOSILICATES ”Axinite” (Ca, Mn, Fe) 3 Al 2 (BO 3 )Si 4 O 12 (OH) Triclinic g, g Beryl Be 3 Al 2 Si 6 O 18 Hexagonal g, g Cordierite Al 3 (Mg, Fe) 2 (AlSi 5 O 18 ) Orthorhombic f, g *Dioptase CuSiO 2 (OH) 2 Hexagonal (Trigonal) g, g ”Tourmaline” (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn) 6 (BO 3 ) 3 (Si 6 O 18 )(OH) 4 Hexagonal f(x3), g(x3) ☺ p-poor, f-fair, g-good Minerals labeled with an (*) will NOT be on tests or quizzes this year in GY 302 Next Tuesday (1:00-1:20 PM): Mineral lab qui z 5 (Neso, Soro and Cyclosilicates)...
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  • Spring '11
  • Staff
  • Crystal system, Silicate minerals, Monoclinic Monoclinic Monoclinic, Monoclinic Monoclinic Monoclinic Orthorhombic Orthorhombic Monoclinic Tetragonal Orthorhombic, Beryl Be3Al2Si6O18 Hexagonal, Orthorhombic Orthorhombic Monoclinic

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