DEUTERATION EFFECT IN THE PHASE-TRANSITION OF (NH4)(2)PBCL6

被引：19

作者：

MURAOKA, H

MATSUO, T

KUME, Y

机构：

[1] OSAKA UNIV,FAC SCI,MICROCALORIMETRY RES CTR,TOYONAKA,OSAKA 560,JAPAN

[2] AZABU UNIV,DEPT ENVIRONM SCI,SAGAMIHARA,KANAGAWA 229,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1995年 / 93卷 / 06期

关键词：

ISOTOPE EFFECTS; HEAT CAPACITY; PHASE TRANSITIONS; THERMODYNAMIC PROPERTIES;

D O I：

10.1016/0038-1098(94)00735-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Heat capacities of ammonium hexachloroplumbate (ND4)(2)PbCl6 and its deuterated analogue (ND4)(2)PbCl6 were measured at temperatures between 13 and 300K. These compounds underwent lambda phase transitions at T-c(H) = 78.1 K and T-c(D) = 80.7 K respectively. The deuterated salt underwent another first order phase transition at 38.4 K. The entropy change of this first order phase transition was 6.5 J K-1 mol(-1). The heat capacities at the lowest temperatures (13-22 K) were larger for the hydrogenous crystal than for the deuterated analogue.

引用

页码：529 / 531

页数：3

共 15 条

[1]

ARMSTRONG PL, 1980, PHYS REP, V57, P344

[2] THERMODYNAMICS OF AMMONIUM HALOPALLIDATES .2. HEAT-CAPACITY AND THERMODYNAMIC PROPERTIES OF (ND4)2PDCL6 AT TEMPERATURES FROM 5-K TO 325-K [J].