Abstract
The crystal structure of α-RbB3O5 was refined by the Rietveld method with due regard for anisotropic vibrations of rubidium atoms to R p = 2.93, R wp = 3.80, R B = 2.53, R F = 2.84, and s = 1.54. The compound is isostructural to CsB3O5: it is orthorhombic, sp. gr. P212121, a = 8.209(1), b = 10.092(1), c = 5.382(1) Å, and V = 445.9 Å 3. The framework structure is formed by the boron-oxygen [B III2 BIVO5] − rings consisting of two [BO3]-triangles and a [BO4]-tetrahedron. The rings are linked to form systems of helical chains running along the twofold screw axes parallel 21 to the a-and b-axes and infinite channels parallel to the a-and c-axes, which accommodate Rb atoms. The data were collected on an ADP-2 diffractometer [CuK α radiation, Ni-filter, 12.00° < 2θ < 110.00°, a step in 2θ equal to 0.02°, count time 8 s per step, and 711 reflections α1 + α2)]. All the calculations were performed using version 3.3 of the WYRIET program. The comparison of the structures of α-and β-RbB3O5 and CsB3O5 revealed that the type of deformations in the framework structures of alkali-metal borates due to the changes of the temperature or the substitution of cations is determined by the role played by metal atoms, and especially, by large and heavy ions.
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References
R. S. Bubnova, M. G. Krzhizhanovskaya, V. B. Trofimov, et al., in Collected Abstracts of Int. Conf. on X-ray Diffraction Analysis of Real Structure of Matter, Slovakia, Liptovsky Mikolas, 1995, p. 67.
S. K. Filatov, R. S. Bubnova, M. G. Krzhizhanovskaya, and I. G. Polyakova, in Abstracts of XVII Congress IUCr, Seattle, 1996, p. C–400.
M. M. Shul’ts, N. M. Vedishcheva, B. A. Shakhmatkin, et al., Fiz. Khim. Stekla 12(6), 651.
J. Kocher, Bull. Soc. Chim. Fr., No. 3, 919 (1968).
R. S. Bubnova, M. G. Krzhizhanovskaya, and S. K. Filatov, in Proceedings of National Conference on Application of X-ray and Synchrotron Radiation, Neutrons, and Electrons to Study of Materials (JINR, Dubna, 1997), Vol. 1, p. 112.
M. G. Krzhizhanovskaya, R. S. Bubnova, V. S. Fundamenskii, et al., in Proceedings of National Conference on Application of X-ray and Synchrotron Radiation, Neutrons, and Electrons to Study of Materials (JINR, Dubna, 1997), Vol. 1, p. 51.
M. G. Krzhizhanovskaya, R. S. Bubnova, V. S. Funda-menskii, et al., Kristallografiya 43(1), 26 (1998) [Crystallogr. Rep. 43 (1), 21 (1998)].
J. Krogh-Moe, Phys. Chem. Glasses 3(3), 101 (1962).
R. D. Shannon, Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. 32(5), 751 (1976).
J. Krogh-Moe, Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. 13, 889 (1960).
J. Krogh-Moe, Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. 30, 1178 (1974).
H. Koenig and R. Hoppe, Z. Anorg. Allg. Chem. 439, 71 (1978).
S. V. Radaev, E. A. Genkina, V. A. Lomonov, et al., Kristallografiya 36(6), 1419 (1991) [Crystallogr. Rep. 36 (6), 803 (1991)].
R. S. Bubnova, V. S. Fundamenskii, I. I. Bannova, et al., in Collected Abstracts Int. Conf. “ Spectroscopy, X-ray Diffraction Analysis, and Crystal Chemistry of Minerals,” Kazan, 1997 (Izd. Kazan. Univ., Kazan, 1997), p. 52.
J. Shneider, in Profile Refinement on IBM-PC’s. IUCr. Int. Workshop on the Rietveld Method, Petten, 1989, p. 71.
R. S. Bubnova, I. G. Polyakova, S. K. Filatov, and M. G. Krzhizhanovskaya, in Borate Glasses Crystals and Melts, Ed s. A. C. Wright, S. A. Feller, and A. C. Hannon (Alden, Oxford, 1997), p. 120.
M. G. Krzhizhanovskaya, R. S. Bubnova, I. I. Bannova, and S. K. Filatov, Kristallografiya 42(2), 264 (1997) [Crystallogr. Rep. 42 (2), 226 (1997)].
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Translated from Kristallografiya, Vol. 45, No. 4, 2000, pp. 629–634.
Original Russian Text Copyright © 2000 by Krzhizhanovskaya, Kabalov, Bubnova, Sokolova, Filatov.
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Krzhizhanovskaya, M.G., Kabalov, Y.K., Bubnova, R.S. et al. Crystal structure of the low-temperature modification of α-RbB3O5 . Crystallogr. Rep. 45, 572–577 (2000). https://doi.org/10.1134/1.1306564
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DOI: https://doi.org/10.1134/1.1306564