3.1 Crystal Structures & Unit Cells
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8 Terms
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What determines the density of the material?
The atoms, type of crystal structure, how much empty space, and porosity
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All solids desire what?
An atomic packing arrangement that minimizes the total energy of the system
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What are examples of close packed patterns?
ABA and ABC
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What is the grain?
A single crystal of a material oriented in some arbitrary direction
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What are grain boundaries?
Disordered boundary areas between mis-oriented single crystal grains
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What constitutes microstructure?
Size and relative orientation of grains
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The presence of of long range order is what makes a material…
crystalline
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Which rotational symmetries can fill all space?
1,2,3,4,6
Note 
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