The NaCl- to CsCl-type phase transition discussed on the basis of the cP to cI deformation with the symmetry Cmcm 4(c) m2m

Sowa, H.

doi:10.1107/S0108767300002609

Acta Crystallographica Section A
Acta Crystallographica
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Figure 2
Schematic representation of the mechanism of the NaCl to CsCl type transition as proposed by Hyde & O'Keeffe (1973

) and Watanabe et al. (1977

). (a) Atomic arrangement in an NaCl-type structure; (b) movement of the (001) atomic layers parallel to [110] by $[\textstyle{1\over8}2^{1/2}a]$ ; (c) metrical variations, arrows indicate the direction of elongation or contraction; (d) CsCl-type structure after the phase transition. Thin lines mark the NaCl-type unit cell, heavy lines that of the CsCl type.

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ISSN: 2053-2733

Volume 56| Part 3| May 2000| Pages 288-299

https://doi.org/10.1107/S0108767300002609

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