CRYSTAL STRUCTURE AND THERMAL EXPANSION OF HIGH-TEMPERATURE ?-RBB3O5 MODIFICATION

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

Research output

Abstract

The structure of the high-temperature RbB3O5 modification (T = 293 K) has been solved by the direct method and refined in the approximation of anisotropic atomic thermal vibrations to R = 0.065. The parameters of the orthorhombic unit cell are a = 8.438(6), b = 8.719(4), and c = 6.240(3) ?; V = 459.1(8) ?3; Z = 4; sp. gr. P212121; Dcalc = 2.863(5) g/cm3. The structure forms a new structure type and consists of a three-dimensional boron-oxygen framework with the structural unit formed by a [BIII2 BIVO5]- ring consisting of two [BO3]-triangles and a [BO4]-tetrahedron. Being connected, these rings form helical chains along the symmetry axis 21 (parallel to the a-and b-axes) and infinite channels along the c-and a-axes in which Rb atoms are located around the symmetry axes. The thermal expansion of the structure is obviously anisotropic: ?a = 18, ?b = -11, ?c = 89.2, and ?v = 96 ? 10-6 ?C-1.
Original languageEnglish
Pages (from-to)21-25
JournalCrystallography Reports
Issue number1
Publication statusPublished - 1998
Externally publishedYes

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Boron
Thermal expansion
thermal expansion
Crystal structure
Oxygen
Atoms
crystal structure
expansion
Temperature
rings
symmetry
triangles
tetrahedrons
boron
vibration
Hot Temperature
oxygen
cells
approximation
atoms

Cite this

Krzhizhanovskaya, M.G. ; Bubnova, R.S. ; Fundamenskii, V.S. ; Bannova, I.I. ; Polyakova, I.G. ; Filatov, S.K. / CRYSTAL STRUCTURE AND THERMAL EXPANSION OF HIGH-TEMPERATURE ?-RBB3O5 MODIFICATION. In: Crystallography Reports. 1998 ; No. 1. pp. 21-25.
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title = "CRYSTAL STRUCTURE AND THERMAL EXPANSION OF HIGH-TEMPERATURE ?-RBB3O5 MODIFICATION",
abstract = "The structure of the high-temperature RbB3O5 modification (T = 293 K) has been solved by the direct method and refined in the approximation of anisotropic atomic thermal vibrations to R = 0.065. The parameters of the orthorhombic unit cell are a = 8.438(6), b = 8.719(4), and c = 6.240(3) ?; V = 459.1(8) ?3; Z = 4; sp. gr. P212121; Dcalc = 2.863(5) g/cm3. The structure forms a new structure type and consists of a three-dimensional boron-oxygen framework with the structural unit formed by a [BIII2 BIVO5]- ring consisting of two [BO3]-triangles and a [BO4]-tetrahedron. Being connected, these rings form helical chains along the symmetry axis 21 (parallel to the a-and b-axes) and infinite channels along the c-and a-axes in which Rb atoms are located around the symmetry axes. The thermal expansion of the structure is obviously anisotropic: ?a = 18, ?b = -11, ?c = 89.2, and ?v = 96 ? 10-6 ?C-1.",
author = "M.G. Krzhizhanovskaya and R.S. Bubnova and V.S. Fundamenskii and I.I. Bannova and I.G. Polyakova and S.K. Filatov",
year = "1998",
language = "English",
pages = "21--25",
journal = "Crystallography Reports",
issn = "1063-7745",
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}

CRYSTAL STRUCTURE AND THERMAL EXPANSION OF HIGH-TEMPERATURE ?-RBB3O5 MODIFICATION. / Krzhizhanovskaya, M.G.; Bubnova, R.S.; Fundamenskii, V.S.; Bannova, I.I.; Polyakova, I.G.; Filatov, S.K.

In: Crystallography Reports, No. 1, 1998, p. 21-25.

Research output

TY - JOUR

T1 - CRYSTAL STRUCTURE AND THERMAL EXPANSION OF HIGH-TEMPERATURE ?-RBB3O5 MODIFICATION

AU - Krzhizhanovskaya, M.G.

AU - Bubnova, R.S.

AU - Fundamenskii, V.S.

AU - Bannova, I.I.

AU - Polyakova, I.G.

AU - Filatov, S.K.

PY - 1998

Y1 - 1998

N2 - The structure of the high-temperature RbB3O5 modification (T = 293 K) has been solved by the direct method and refined in the approximation of anisotropic atomic thermal vibrations to R = 0.065. The parameters of the orthorhombic unit cell are a = 8.438(6), b = 8.719(4), and c = 6.240(3) ?; V = 459.1(8) ?3; Z = 4; sp. gr. P212121; Dcalc = 2.863(5) g/cm3. The structure forms a new structure type and consists of a three-dimensional boron-oxygen framework with the structural unit formed by a [BIII2 BIVO5]- ring consisting of two [BO3]-triangles and a [BO4]-tetrahedron. Being connected, these rings form helical chains along the symmetry axis 21 (parallel to the a-and b-axes) and infinite channels along the c-and a-axes in which Rb atoms are located around the symmetry axes. The thermal expansion of the structure is obviously anisotropic: ?a = 18, ?b = -11, ?c = 89.2, and ?v = 96 ? 10-6 ?C-1.

AB - The structure of the high-temperature RbB3O5 modification (T = 293 K) has been solved by the direct method and refined in the approximation of anisotropic atomic thermal vibrations to R = 0.065. The parameters of the orthorhombic unit cell are a = 8.438(6), b = 8.719(4), and c = 6.240(3) ?; V = 459.1(8) ?3; Z = 4; sp. gr. P212121; Dcalc = 2.863(5) g/cm3. The structure forms a new structure type and consists of a three-dimensional boron-oxygen framework with the structural unit formed by a [BIII2 BIVO5]- ring consisting of two [BO3]-triangles and a [BO4]-tetrahedron. Being connected, these rings form helical chains along the symmetry axis 21 (parallel to the a-and b-axes) and infinite channels along the c-and a-axes in which Rb atoms are located around the symmetry axes. The thermal expansion of the structure is obviously anisotropic: ?a = 18, ?b = -11, ?c = 89.2, and ?v = 96 ? 10-6 ?C-1.

M3 - Article

SP - 21

EP - 25

JO - Crystallography Reports

JF - Crystallography Reports

SN - 1063-7745

IS - 1

ER -