THERMAL PHASE-TRANSITION OF CESIUM FORMATE

被引：15

作者：

MASUDA, Y ^{[1
]}

YAHATA, A ^{[1
]}

OGAWA, H ^{[1
]}

机构：

[1] NIIGATA UNIV,FAC SCI,DEPT CHEM,NIIGATA 95021,JAPAN

来源：

INORGANIC CHEMISTRY | 1995年 / 34卷 / 12期

关键词：

D O I：

10.1021/ic00116a002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The phase transition of cesium formate observed at around 36 degrees C was found to be a reversible first-order transition by means of thermal analyses, The results of the Rietveld analysis of powder X-ray diffraction data showed that an orthorhombic phase (Pbcm, Z = 8; a = 4.785(1), b = 9.553(9), and c = 15.927(2) Angstrom) transformed to a cubic phase (Pm3m, Z = 1; a = 4.500(5) Angstrom). The large values of enthalpy and entropy change for the transition (Delta H-tr = 6.87 +/- 0.28 kJ mol(-1) and Delta S-tr = 22.2 +/- 0.9 J K-1 mol(-1)) were discussed on the basis of the change of the orientation freedom of the formate ion.

引用

页码：3130 / 3133

页数：4

共 9 条

[1]

Braghetti M., 1969, ANN M CHIM INORG, P101

[2]

FERLONI P, 1975, Z NATURFORSH A, V30, P1147

[3] RIETVELD ANALYSIS OF POWDER PATTERNS OBTAINED BY TOF NEUTRON-DIFFRACTION USING COLD NEUTRON SOURCES [J].