GEOS 306 Midterm: GEOS 306 University of Arizona Geo306 2015 Midterm 1
31 Jan 2019
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Identify the different locations where cations could be coordinated with 2, 3, 4, 6, or 12 anions. In the position of the cation, write its coordination number. (4 pts) label the packing type for each of the following diagrams: (15 pts) derive the radius-ratio rule parameter (r. Draw a picture and carefully label everything so that your answer can be evaluated properly: (20 pts) forsterite, mg2sio4, is an important hcp rock-forming mantle mineral found in earth, mars and meteorites. How does it fit into this structure: (10 pts) from the microprobe analyses of a mineral, the following oxide weight percents were measured. Bonus (1 pt) name the mineral: (5 pts) the largest marine oil spill in history occurred in 2010 in the gulf of mexico when a surge of natural gas blasted through a closed and sealed well. Attempts to stop the leak failed because a solid compound formed at depth and prevented the workers from creating a tight seal.
