CsCl can be thought of as two interpenetrating simple cubic arrays where the corner of one cell sits at the body center of the other. As with NaCl, the 1:1 stoichiometry means that the cell will look the same regardless of whether we start with anions or cations on the corner. Note that each ion is 8-coordinate rather than 6-coordinate as in NaCl.
|CsCl Vital Statistics|
|Space Group||Pm3m, No. 221|
|Cell Parameters||a = 4.123 Å, Z=1|
|Atomic Positions||Cl: 0, 0, 0 Cs: 0.5, 0.5, 0.5
(can interchange if desired)
|Melting Point||646 degrees C|
|NH4X, TlX (X = halide), CuZn (beta-brass),
AgZn, LiHg, MgSr
|Fig. 1 A single unit cell of CsCl||Fig. 2 A 3x3x3 lattice of CsCl|
|Fig. 3 The (111) plane of CsCl.||Fig. 4 The (100 plane of CsCl.|
Self-Study: Which set of planes contain the body center and the points (0,0,1), (1/2,0,1/2) and (0,1/2,1/2)?
Self-Study: What would a polyhedral representation of this structure look like?
|Fig. 5 A single unit cell of CsCl.||Fig. 6 A 2x2x2 chunk of CsCl lattice.|
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This page was last updated Saturday, January 17, 2004
This document and associated figures are copyright 1996-2014 by Rob Toreki. All rights reserved.