Lecture - Introduction to Crystallography - Faculty Server Contact

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$Math 431 An Introduction to Probability Final Exam — Solutions$

Open form – doesn’t enclose space Closed form – encloses space Types of Open forms • Pinacoids – two parallel faces {100}, {010}, {001} • Prisms – four parallel faces {110}, {101}, {011} Some examples of closed forms • Rhombic dipyramid {111} – eight inclined corner faces • Octahedron {111} – eight triangular faces • Dodecahedron {011} – 12 rhomb-shaped faces • Tetrahexahedron {0kl} – consists of 24 isosceles triangular faces
Zone – a collection of crystal faces with parallel edges. In crystal classes with orthogonal axes (isometric, tetragonal, orthorhombic) zone axes correspond with crystallographic axes. For example, zone [001] is perpendicular <strong>to</strong> face (001). In crystal classes where all axes are not orthogonal, the zone axes do not correspond <strong>to</strong> some or all of the crystallographic axes.
Page 1 and 2: Earth Materials I Crystallography
Page 3 and 4: Symmetry Element - geometric featur
Page 5: Center of symmetry Inversion Rotoin
Page 10 and 11: Miller Indices Three integers ident
Page 12 and 13: Miller-Bravais Index in the hexagon
Page 16 and 17: Twins - rational, symmetrical inter
Page 18 and 19: Example: Spinel twin - twin plane i
Page 22: Penetration twin - twining of monoc
Page 25 and 26: In the case of the 32 point groups
Page 27 and 28: Screw axis - rotational operation w
Page 29 and 30: Examples of Crystallographic Descri
Page 32 and 33: Example of reconstructive polymorph
Page 34 and 35: Example of displacive polymorphism

Lecture - Introduction to Crystallography - Faculty Server Contact

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