HW7-MEMS1054_AY2111

HW7-MEMS1054_AY2111 - HW#7 MEMS1054 Return Solutions by...

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HW#7 MEMS1054 Return Solutions by Wednesday, Nov. 10, 2010 Date Name 1) List the major proper point symmetry elements/operations, e.g. proper rotation axes, improper rotations, reflection/mirror planes etc. .., that are compatible with the translational symmetry of a crystal lattice. You can omit screw axes and glide planes here. 2) Distinguish between a space group symbol and the respective point groups symbol for a given crystal structure. … in other words, define in general what is meant by the point group of a crystal structure and what is meant by the space group of a crystal structure. 3) Shown below are a ten point group symbols for crystals. Identify the point group symbols that describe orthorhombic, tetragonal and cubic crystal structures. i) m ii) mm2 iii) 23 iv) 432 v) 422 vi) 32 vii) 4 3m viii) 222 ix) 2/m x) 4/m Figure 1 - Depiction of a projection view of the diamond cubic structure.
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4) The elemental semiconductor silicon (Si) exhibits a diamond cubic crystal structure (the
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This note was uploaded on 01/07/2011 for the course MEMS Mems1054 taught by Professor Wiezorek during the Fall '10 term at Pittsburgh.

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HW7-MEMS1054_AY2111 - HW#7 MEMS1054 Return Solutions by...

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