The temperature factor of an atom in a rigid vibrating molecule. II. Anisotropic thermal motion

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Abstract
The analysis in part I is generalized to any crystal containing rigid molecules which undergo anisotropic translational and librational motion about a site fixed by symmetry. The treatment is correct to terms in (ui 2)2 and (ωi 2)2, where (ui 2) is the mean-square translational displacement of the molecule along the ith axis and (ωi 2) is the mean-square angular libration about the same axis. The first-order treatment to terms in (ui 2) and (ωi 2) is shown to be equivalent to the rigid-body theory in current use.