302-pp14 - Mineral Quiz 1 results 1: Antimony (28%) 2:...

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Mineral Quiz 1 results 1: Antimony (28%) 2: Cinnabar (100%) 3. Niccolite (28%) 4: Sphalerite (94%) 5: Enargite (06%) 6: Stibnite (37%) 2011: Average: 60.4% Highest grade: 80% 010 A 52 5% Hi h t d
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2011 v 2011 Mineral Quiz Results 2010 1: Tetrahedrite (41%) 2: Antimony (22%) 3. Enargite (11%) 4: Chalcopyrite (67%) 5: Silver (48%) 6: Jamesonite (37%) 7: Covellite (63%) 2010: Average: 52.5% Highest grade: 91% 2011 1: Antimony (28%) 2: Cinnabar (100%) 3. Niccolite (28%) 4: Sphalerite (94%) 5: Enargite (06%) 6: Stibnite (37%) 2011: Average: 60.4% Highest grade: 80%
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GY 302: Crystallography & Mineralogy GY 302: Crystallography & Mineralogy UNIVERSITY OF SOUTH ALABAMA Lecture 14: Halides Lecture 14: Halides
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Last Time More Oxides 1. Chromite (and Chromium) 2. Uraninite (and Uranium) 3. Chromite formation (ultramafic intrusions) 4. Uraninite formation (sedimentary, placer) 5. Supergene enrichment (recap of hydrothermal emplacement)
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Chromite Chromite (FeCr (FeCr 2 O O 4 ) ) Crystal: Isometric Pt. Group: 4/m 3 2/m Habit: octahedral, sucrosic SG: 5.10 H: 5.5 L: metallic Col: black (brownish) Str: black (brown) Clev: none; twinning on {111}; concoidal fracture Name derivation: From its elemental composition containing chrom Name derivation: From its elemental composition containing chrom ium ium Oxide Minerals http://www.theodoregray.com/PeriodicTable/Samples/Chromite/s12s.JPG
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Oxide Minerals
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Uraninite (UO 2 ) Crystal: Isometric Pt. Group: 4/m 3 2/m Habit: massive, botryoidal SG: 7.0-9.5 H: 5.5 L: submetallic to dull Col: black Str: brown to black Clev: none; concoidal fracture Name derivation: From its elemental composition containing uranium Oxide Minerals http://www.treasuremountainmining.com/eb56uran1M.jpg
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302-pp14 - Mineral Quiz 1 results 1: Antimony (28%) 2:...

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