Crystal Lattice Structures
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Introduction

Simple Cubic

Body Centered Cubic

Face Centered Cubic

Primitive FCC

Simple Hexagonal

Hexagonal Closest Packing

HCP Coordination

Cubic Closest Packing

CCP Coordination

Rhombohedral

2- & 3-Layer repeats

4-layer repeats

Tetrahedral Holes

Octahedral Holes

CsCl

NaCl

Halite

Fluorite

Zinc Blende

Exercises

Calcium Fluoride
  The structure of the mineral fluorite (calcium fluoride) may be viewed as a FCC lattice of cations (Z = 4), with the smaller anions occupying all of the Td holes (Z = 8). The Td cavities reside on a Simple Cubic lattice which is half the dimension of the CCP lattice.
Ca and F lattices in Fluorite, CaF2
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Steven F. Watkins, Department of Chemistry, Louisiana State University