Homework #1 - = 11524 Face A: a = 17.96, b = 2.73, c =...

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Exercise #1 Due BEFORE CLASS on September 8, 2010 Rules: You may use any reference you would like. You are encouraged to help each other, but please write your own answers. Neatness counts (use a clean sheet of paper and make your drawings sufficiently large and your calculations neat). Show all work. Remember, no late work is accepted. Through X-ray diffraction, you determine the unit cell dimensions (in Å) and angular relationships for the following minerals. Clinozoisite: Unit cell: a = 8.98, b = 5.46, c = 10.22;
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Unformatted text preview: = 11524 Face A: a = 17.96, b = 2.73, c = 20.44 Face B: a = 4.49, b = 5.46, c = Zircon: Unit cell: a = 6.60, c = 5.98 Face A : a 1 = 2.20, a 2 = 6.60, c = 11.96 Face B: a 1 = 6.60, a 2 = 6.60, c = 2.99 a) To which crystal system do they belong? b) Neatly and to scale, draw the crystallographic axes of both minerals. c) The axial intercepts of two crystal faces are given for each mineral (in cm). Calculate the Miller Indices for both faces of both minerals....
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