Crystal structure and thermal expansion of Rb5B19O31

M. G. Krzhizhanovskaya, R. S. Bubnova, I. I. Bannova, S. K. Filatov

Research output

20 Citations (Scopus)

Abstract

The crystal structure of Rb5B19O3, monoclinic, sp. gr. C2lc, a = 18.211(3), b = 11.519(2), c = 13.310(2) Å, β= 95.63(1)°, V = 2778(1) Å3, Z = 4, dcalc = 2.714 g/cm3. It is determined by X-ray diffraction analysis (P21 Syntex diffractometer, MoKα radiation, 2280 reflections, R = 0.050) starting from the atomic coordinates for the isotructural K5B19O31. The thermal vibrations of Rb and O atoms are considered in the anisotropic approximation. The structure is a three-dimensional framework built of complicated anions of four types: triangles; tetrahedra; [BIVBIII 2O5]- ringsconsisting of two triangles and a tetrahedron; and double [BIVBIII 4O8]- rings consisting of two simple rings with sharing a tetrahedron. Alternating ordinary and double rings form helical chains about the 21 screw axes. Contraction of these chains during heating is presumably the main reason for a strong anisotropy of thermal strain revealed in the crystals by high-temperature X-ray diffraction method.

Original languageRussian
Pages (from-to)187-192
Number of pages6
JournalCrystallography Reports
Volume44
Issue number2
Publication statusPublished - 1 Mar 1999

Scopus subject areas

  • Condensed Matter Physics

Cite this

Krzhizhanovskaya, M. G. ; Bubnova, R. S. ; Bannova, I. I. ; Filatov, S. K. / Crystal structure and thermal expansion of Rb5B19O31. In: Crystallography Reports. 1999 ; Vol. 44, No. 2. pp. 187-192.
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abstract = "The crystal structure of Rb5B19O3, monoclinic, sp. gr. C2lc, a = 18.211(3), b = 11.519(2), c = 13.310(2) {\AA}, β= 95.63(1)°, V = 2778(1) {\AA}3, Z = 4, dcalc = 2.714 g/cm3. It is determined by X-ray diffraction analysis (P21 Syntex diffractometer, MoKα radiation, 2280 reflections, R = 0.050) starting from the atomic coordinates for the isotructural K5B19O31. The thermal vibrations of Rb and O atoms are considered in the anisotropic approximation. The structure is a three-dimensional framework built of complicated anions of four types: triangles; tetrahedra; [BIVBIII 2O5]- ringsconsisting of two triangles and a tetrahedron; and double [BIVBIII 4O8]- rings consisting of two simple rings with sharing a tetrahedron. Alternating ordinary and double rings form helical chains about the 21 screw axes. Contraction of these chains during heating is presumably the main reason for a strong anisotropy of thermal strain revealed in the crystals by high-temperature X-ray diffraction method.",
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Crystal structure and thermal expansion of Rb5B19O31. / Krzhizhanovskaya, M. G.; Bubnova, R. S.; Bannova, I. I.; Filatov, S. K.

In: Crystallography Reports, Vol. 44, No. 2, 01.03.1999, p. 187-192.

Research output

TY - JOUR

T1 - Crystal structure and thermal expansion of Rb5B19O31

AU - Krzhizhanovskaya, M. G.

AU - Bubnova, R. S.

AU - Bannova, I. I.

AU - Filatov, S. K.

PY - 1999/3/1

Y1 - 1999/3/1

N2 - The crystal structure of Rb5B19O3, monoclinic, sp. gr. C2lc, a = 18.211(3), b = 11.519(2), c = 13.310(2) Å, β= 95.63(1)°, V = 2778(1) Å3, Z = 4, dcalc = 2.714 g/cm3. It is determined by X-ray diffraction analysis (P21 Syntex diffractometer, MoKα radiation, 2280 reflections, R = 0.050) starting from the atomic coordinates for the isotructural K5B19O31. The thermal vibrations of Rb and O atoms are considered in the anisotropic approximation. The structure is a three-dimensional framework built of complicated anions of four types: triangles; tetrahedra; [BIVBIII 2O5]- ringsconsisting of two triangles and a tetrahedron; and double [BIVBIII 4O8]- rings consisting of two simple rings with sharing a tetrahedron. Alternating ordinary and double rings form helical chains about the 21 screw axes. Contraction of these chains during heating is presumably the main reason for a strong anisotropy of thermal strain revealed in the crystals by high-temperature X-ray diffraction method.

AB - The crystal structure of Rb5B19O3, monoclinic, sp. gr. C2lc, a = 18.211(3), b = 11.519(2), c = 13.310(2) Å, β= 95.63(1)°, V = 2778(1) Å3, Z = 4, dcalc = 2.714 g/cm3. It is determined by X-ray diffraction analysis (P21 Syntex diffractometer, MoKα radiation, 2280 reflections, R = 0.050) starting from the atomic coordinates for the isotructural K5B19O31. The thermal vibrations of Rb and O atoms are considered in the anisotropic approximation. The structure is a three-dimensional framework built of complicated anions of four types: triangles; tetrahedra; [BIVBIII 2O5]- ringsconsisting of two triangles and a tetrahedron; and double [BIVBIII 4O8]- rings consisting of two simple rings with sharing a tetrahedron. Alternating ordinary and double rings form helical chains about the 21 screw axes. Contraction of these chains during heating is presumably the main reason for a strong anisotropy of thermal strain revealed in the crystals by high-temperature X-ray diffraction method.

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