TY - JOUR

T1 - Phase transitions and high-temperature crystal chemistry of polymorphous modifications of Cs2(UO2)2(MoO4)

AU - Nazarchuk, E. V.

AU - Krivovichev, S. V.

AU - Filatov, S. K.

PY - 2004/9/1

Y1 - 2004/9/1

N2 - Phase transitions and thermal deformations of α- and β-Cs 2(UO2)2(MoO4)3 were studied by high-temperature X-ray diffraction analysis. In heating of α-Cs2(UO2)2(MoO4)3 to 625 ± 25°C, the reconstructive phase transition α → β proceeds. β -Cs2(UO2)2(MoO 4)3 is stable up to 700 ±25°C. The thermal expansion of both phases is sharply anisotropic: α11 = 10 × 10-6, α22 = 33 × 10-6, α 33 = 10 × 10-6, αV = 53 × 10-6 deg-1 for α -Cs(UO2) 2(MoO4)3 and α11 = 13 × 10-6, α33 = 3 × 10-6, αV = 31 × 10-6 deg-1 for β-Cs2 (UO2)2 (MoO4) 3. The anisotropy of thermal expansion is explained by features of the crystal structure of the compounds.

AB - Phase transitions and thermal deformations of α- and β-Cs 2(UO2)2(MoO4)3 were studied by high-temperature X-ray diffraction analysis. In heating of α-Cs2(UO2)2(MoO4)3 to 625 ± 25°C, the reconstructive phase transition α → β proceeds. β -Cs2(UO2)2(MoO 4)3 is stable up to 700 ±25°C. The thermal expansion of both phases is sharply anisotropic: α11 = 10 × 10-6, α22 = 33 × 10-6, α 33 = 10 × 10-6, αV = 53 × 10-6 deg-1 for α -Cs(UO2) 2(MoO4)3 and α11 = 13 × 10-6, α33 = 3 × 10-6, αV = 31 × 10-6 deg-1 for β-Cs2 (UO2)2 (MoO4) 3. The anisotropy of thermal expansion is explained by features of the crystal structure of the compounds.

UR - http://www.scopus.com/inward/record.url?scp=13444259843&partnerID=8YFLogxK

U2 - 10.1007/s11137-005-0005-x

DO - 10.1007/s11137-005-0005-x

M3 - Article

AN - SCOPUS:13444259843

VL - 46

SP - 438

EP - 440

JO - Radiochemistry

JF - Radiochemistry

SN - 1066-3622

IS - 5

ER -