Crystal structure and thermal behaviour of (Rb,Cs)BSi2O 6 solid solutions

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Crystal structure and thermal behaviour of (Rb,Cs)BSi₂O ₆ solid solutions. / Krzhizhanovskaya, M. G.; Bubnova, R. S.; Filatov, S. K.; Meyer, D. C.; Paufler, P.

In: Crystal Research and Technology, Vol. 41, No. 3, 01.03.2006, p. 285-292.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{bda47bb6b11d4a369b3560945316580f,

title = "Crystal structure and thermal behaviour of (Rb,Cs)BSi2O 6 solid solutions",

abstract = "The crystal chemistry of Rb-Cs boroleucites has been studied by means of X-ray powder diffraction at room and elevated temperatures. The cubic I-43d → cubic Ia3d phase transition was investigated using a series of samples prepared by solid-state reaction along the pseudobinary system RbBSi 2O6 - CsBSi2O6. The Rietveld refinement of the structures of Rb1-xCsxBSi 2O6 solid solutions (x = 0.2, 0.4, 0.6, 0.8) demonstrates that the solutions with a high Rb content crystallise in the cubic I-43d space group, and the boroleucites with a considerable Cs content have Ia3d symmetry. Rb can substitute Cs in a wide range of compositions. Within a narrow range of x = 0.5 - 0.6 immiscibility was revealed. Under Rb-Cs substitution the cubic lattice parameter, the (Rb,Cs)-O distances, and the angles between tetrahedra of the I-43d phase change clearly, while those of the Ia3d phase change slightly. The HTXRD data shows that the I-43d phase transforms into a Ia3d phase on heating analogously to a change of the composition. As the Cs content increases the transition temperature decreases. The low temperature 1-43d phase shows a higher thermal expansion than the high temperature Ia3d phase.",

keywords = "Crystal structure, Glassforming borosilicates, High-temperature powder diffraction, Phase transition, Thermal expansion",

author = "Krzhizhanovskaya, {M. G.} and Bubnova, {R. S.} and Filatov, {S. K.} and Meyer, {D. C.} and P. Paufler",

year = "2006",

month = mar,

day = "1",

doi = "10.1002/crat.200510575",

language = "English",

volume = "41",

pages = "285--292",

journal = "Crystal Research and Technology",

issn = "0232-1300",

publisher = "Wiley-Blackwell",

number = "3",

}

RIS

TY - JOUR

T1 - Crystal structure and thermal behaviour of (Rb,Cs)BSi2O 6 solid solutions

AU - Krzhizhanovskaya, M. G.

AU - Bubnova, R. S.

AU - Filatov, S. K.

AU - Meyer, D. C.

AU - Paufler, P.

PY - 2006/3/1

Y1 - 2006/3/1

N2 - The crystal chemistry of Rb-Cs boroleucites has been studied by means of X-ray powder diffraction at room and elevated temperatures. The cubic I-43d → cubic Ia3d phase transition was investigated using a series of samples prepared by solid-state reaction along the pseudobinary system RbBSi 2O6 - CsBSi2O6. The Rietveld refinement of the structures of Rb1-xCsxBSi 2O6 solid solutions (x = 0.2, 0.4, 0.6, 0.8) demonstrates that the solutions with a high Rb content crystallise in the cubic I-43d space group, and the boroleucites with a considerable Cs content have Ia3d symmetry. Rb can substitute Cs in a wide range of compositions. Within a narrow range of x = 0.5 - 0.6 immiscibility was revealed. Under Rb-Cs substitution the cubic lattice parameter, the (Rb,Cs)-O distances, and the angles between tetrahedra of the I-43d phase change clearly, while those of the Ia3d phase change slightly. The HTXRD data shows that the I-43d phase transforms into a Ia3d phase on heating analogously to a change of the composition. As the Cs content increases the transition temperature decreases. The low temperature 1-43d phase shows a higher thermal expansion than the high temperature Ia3d phase.

AB - The crystal chemistry of Rb-Cs boroleucites has been studied by means of X-ray powder diffraction at room and elevated temperatures. The cubic I-43d → cubic Ia3d phase transition was investigated using a series of samples prepared by solid-state reaction along the pseudobinary system RbBSi 2O6 - CsBSi2O6. The Rietveld refinement of the structures of Rb1-xCsxBSi 2O6 solid solutions (x = 0.2, 0.4, 0.6, 0.8) demonstrates that the solutions with a high Rb content crystallise in the cubic I-43d space group, and the boroleucites with a considerable Cs content have Ia3d symmetry. Rb can substitute Cs in a wide range of compositions. Within a narrow range of x = 0.5 - 0.6 immiscibility was revealed. Under Rb-Cs substitution the cubic lattice parameter, the (Rb,Cs)-O distances, and the angles between tetrahedra of the I-43d phase change clearly, while those of the Ia3d phase change slightly. The HTXRD data shows that the I-43d phase transforms into a Ia3d phase on heating analogously to a change of the composition. As the Cs content increases the transition temperature decreases. The low temperature 1-43d phase shows a higher thermal expansion than the high temperature Ia3d phase.

KW - Crystal structure

KW - Glassforming borosilicates

KW - High-temperature powder diffraction

KW - Phase transition

KW - Thermal expansion

UR - http://www.scopus.com/inward/record.url?scp=33644895062&partnerID=8YFLogxK

U2 - 10.1002/crat.200510575

DO - 10.1002/crat.200510575

M3 - Article

AN - SCOPUS:33644895062

VL - 41

SP - 285

EP - 292

JO - Crystal Research and Technology

JF - Crystal Research and Technology

SN - 0232-1300

IS - 3

ER -

ID: 47837833