Crystal structure of K1-xCsxBSi2O6 (x = 0.12, 0.50) boroleucite solid solutions and thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6

Standard

Crystal structure of K_1-xCs_xBSi₂O₆ (x = 0.12, 0.50) boroleucite solid solutions and thermal behaviour of KBSi₂O₆ and K_0.5Cs_0.5BSi₂O₆. / Bubnova, R. S.; Levin, A. A.; Stepanov, N. K.; Belger, A.; Meyer, D. C.; Polyakova, I. G.; Filatov, S. K.; Paufler, P.

In: Zeitschrift fur Kristallographie, Vol. 217, No. 2, 01.01.2002, p. 55-62.

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

Author

Bubnova, R. S. ; Levin, A. A. ; Stepanov, N. K. ; Belger, A. ; Meyer, D. C. ; Polyakova, I. G. ; Filatov, S. K. ; Paufler, P. / Crystal structure of K_1-xCs_xBSi₂O₆ (x = 0.12, 0.50) boroleucite solid solutions and thermal behaviour of KBSi₂O₆ and K_0.5Cs_0.5BSi₂O₆. In: Zeitschrift fur Kristallographie. 2002 ; Vol. 217, No. 2. pp. 55-62.

BibTeX

@article{0e21cae4a33548c8a5f4413d96259c9f,

title = "Crystal structure of K1-xCsxBSi2O6 (x = 0.12, 0.50) boroleucite solid solutions and thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6",

abstract = "The crystal structures of two K1-xCsxBSi2O6 solid solutions have been refined at room temperature dy the Rietveld method: x = 0.12, a = 12.6858(4) {\AA}, Rwp = 7.66%, RF = 5.56% and x = 0.50, a = 12.8480(2) {\AA}, Rwp = 7.64%, RF = 3.10%. They are isostructural to cubic KBSi2O6 with the space group I{\=4}3d. The structure is built up from (Si,B)O4 tetrahedra linked in four-, six- and eight-fold rings which are forming a three-dimensional borosilicate framework. The framework contains large cavities that are placed in continuous channels along the [111] directions. The Cs and K atoms occupy the positions in the channels statistically. Thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6 has been studied by high-temperature powder X-ray diffraction within the temperature range of 293-1073 K. A new tetragonal polymorph of KBSi2O6 has been found in situ under heating. The new polymorphic I{\=4}3d (cubic) - Ia{\=3}d (cubic) transition and the new Ia{\=3}d cubic polymorphic phase has been proposed for K1-xCsxBSi2O6 from our experimental and literature data on crystal structures and thermal expansion of leucites. The structural relaxation under cationic (K, Cs) substitutions and under heating has been investigated.",

author = "Bubnova, {R. S.} and Levin, {A. A.} and Stepanov, {N. K.} and A. Belger and Meyer, {D. C.} and Polyakova, {I. G.} and Filatov, {S. K.} and P. Paufler",

year = "2002",

month = jan,

day = "1",

doi = "10.1524/zkri.217.2.55.20628",

language = "English",

volume = "217",

pages = "55--62",

journal = "Zeitschfrift fur Kristallographie",

issn = "0044-2968",

publisher = "De Gruyter",

number = "2",

}

RIS

TY - JOUR

T1 - Crystal structure of K1-xCsxBSi2O6 (x = 0.12, 0.50) boroleucite solid solutions and thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6

AU - Bubnova, R. S.

AU - Levin, A. A.

AU - Stepanov, N. K.

AU - Belger, A.

AU - Meyer, D. C.

AU - Polyakova, I. G.

AU - Filatov, S. K.

AU - Paufler, P.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - The crystal structures of two K1-xCsxBSi2O6 solid solutions have been refined at room temperature dy the Rietveld method: x = 0.12, a = 12.6858(4) Å, Rwp = 7.66%, RF = 5.56% and x = 0.50, a = 12.8480(2) Å, Rwp = 7.64%, RF = 3.10%. They are isostructural to cubic KBSi2O6 with the space group I4̄3d. The structure is built up from (Si,B)O4 tetrahedra linked in four-, six- and eight-fold rings which are forming a three-dimensional borosilicate framework. The framework contains large cavities that are placed in continuous channels along the [111] directions. The Cs and K atoms occupy the positions in the channels statistically. Thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6 has been studied by high-temperature powder X-ray diffraction within the temperature range of 293-1073 K. A new tetragonal polymorph of KBSi2O6 has been found in situ under heating. The new polymorphic I4̄3d (cubic) - Ia3̄d (cubic) transition and the new Ia3̄d cubic polymorphic phase has been proposed for K1-xCsxBSi2O6 from our experimental and literature data on crystal structures and thermal expansion of leucites. The structural relaxation under cationic (K, Cs) substitutions and under heating has been investigated.

AB - The crystal structures of two K1-xCsxBSi2O6 solid solutions have been refined at room temperature dy the Rietveld method: x = 0.12, a = 12.6858(4) Å, Rwp = 7.66%, RF = 5.56% and x = 0.50, a = 12.8480(2) Å, Rwp = 7.64%, RF = 3.10%. They are isostructural to cubic KBSi2O6 with the space group I4̄3d. The structure is built up from (Si,B)O4 tetrahedra linked in four-, six- and eight-fold rings which are forming a three-dimensional borosilicate framework. The framework contains large cavities that are placed in continuous channels along the [111] directions. The Cs and K atoms occupy the positions in the channels statistically. Thermal behaviour of KBSi2O6 and K0.5Cs0.5BSi2O6 has been studied by high-temperature powder X-ray diffraction within the temperature range of 293-1073 K. A new tetragonal polymorph of KBSi2O6 has been found in situ under heating. The new polymorphic I4̄3d (cubic) - Ia3̄d (cubic) transition and the new Ia3̄d cubic polymorphic phase has been proposed for K1-xCsxBSi2O6 from our experimental and literature data on crystal structures and thermal expansion of leucites. The structural relaxation under cationic (K, Cs) substitutions and under heating has been investigated.

UR - http://www.scopus.com/inward/record.url?scp=0036200301&partnerID=8YFLogxK

U2 - 10.1524/zkri.217.2.55.20628

DO - 10.1524/zkri.217.2.55.20628

M3 - Article

AN - SCOPUS:0036200301

VL - 217

SP - 55

EP - 62

JO - Zeitschfrift fur Kristallographie

JF - Zeitschfrift fur Kristallographie

SN - 0044-2968

IS - 2

ER -

ID: 53952512