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test 1 - MINERALOGY First In-class Exam Name Answer all...

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MINERALOGY First In-class Exam October 13, 2008 Name ______________________ Answer all questions. Their values are indicated next to the question. Closed book, closed help, open mind. Cheating will result in a failing grade for the class. You have one hour. (1) (10 points) For the first five minerals in the following list write the exact chemical formula beside the mineral name. For the second five minerals in the list write the group of the mineral (e.g. silicate, oxide, halide etc.). For these five minerals, you will get 0.5 extra credit points for each correct major cation (excluding Si and Al) listed that makes up the mineral. You will lose 0.5 points for each incorrect cation listed. Chemical Formulas: (1) Forsterite (2) Dolomite (3) Anhydrite (4) Gypsum (5) Tridymite Groups (1) Phlogopite (2) Cerrusite (3) Witherite (4) Strontianite (5) Muscovite 1
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(2) (15 points) a) Define mineral. b) List the eight most abundant elements making up earth’s crust. Abundances of two of these element(s) would be much greater if the bulk earth were considered, rather than just the crust.
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