Temperature dependence of the SbSI soft mode in the paraelectric phase

Massot, M.; Teng, Miao; Vittori, J. F.; Bałkanski, M.; Ziółkiewicz, S.; Gervais, F.; Servoin, J. L.

doi:10.1080/00150198208202020

Cited by 7 publications

(1 citation statement)

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“…Several members of this group show interesting physical properties (optical, photoconducting, ferroelectric, etc. ) and have drawn the attention of numerous investigators (Teng, Balkanski, Massot and Ziolkiewicz, 1974;Siapkas, 1974;Bartzokas and Siapkas, 1976;Bartzokas and Siapkas, 1980;Massot, Teng, Vittori, Balkanski, Ziolkiewicz, Gervais and Servoin, 1981). In the case of BiSeCl no other structural data have been found in the accessible literature.…”

Section: Introductionmentioning

confidence: 96%

Crystal structure of bismuth selenochloride, BiSeCl

Voutsas¹,

Rentzeperis²

1986

Zeitschrift Für Kristallographie - Crystalline Materials

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The crystal structure of BiSeCl has been determined with 667 independent reflections, using three-dimensional intensities. The cell constants, obtained by least-squares calculation from direct 0-value measurements on the diffractometer, are: a = 8.0787(8), b = 9.3046(6), c = 4.2182(4) Ä with Ζ = 4 formula units per unit cell; the space group is Prwan. The positional and vibrational parameters, with anisotropic temperature factors, were refined by full-matrix least-squares calculations to a final R = 0.032.Each Bi atom is six-coordinated by three Se atoms at distances 2.727-2.855 Ä and three CI atoms at distances 2.899-3.186 A. Two of the Se atoms and two CI atoms form a parallelogram parallel to c, with the remaining atoms occupying the apices of the pyramids formed on either side of this parallelogram. The coordination polyhedron is linked to a symmetry-equivalent polyhedron by a common Se-Se edge. This characteristic double-polyhedron system is repeated along the c axis, thus forming an infinite double chain of composition {Bi 2 Se4Cl 6 } n · The chain is further linked to each of four similar chains by a common (CI-Cl)"-row parallel to c. The structure constitutes a new type within the group of compounds of the general formula A^BjfC^1 1 , with A = As, Sb, Bi; Β = S, Se, Te; C = CI, Br, I.

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