OXYGEN NONSTOICHIOMETRY OF (ND2/3CE1/3)(4)(BA2/3ND1/3)(4)CU6O16+X

被引：5
|
作者：
PATRAKEEV, MV
LEONIDOV, IA
LAKHTIN, AA
KOZHEVNIKOV, VL
NIKOLAEV, AV
机构：
[1] RUSSIAN ACAD SCI,DIV URAL,INST SOLID STATE CHEM,SVERDLOVSK 620219,RUSSIA
[2] RUSSIAN FRENCH JOINT VENTURE QUORUS,SVERDLOVSK 620075,RUSSIA
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 120卷 / 01期
关键词：
D O I：
10.1006/jssc.1995.1389
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The equilibrium oxygen content of (Nd2/3Ce1/3)(4)(Ba-2/3 Nd-1/3)(4)Cu6O16+x was measured by coulomeric titration in the temperature range 550-820 degrees C and at oxygen pressures between 10(-3) and 1 atm. From the results, the partial molar enthalpy and entropy of oxygen were calculated as functions of the oxygen content. The data were explained based on a point defects model and the equilibrium constants of the redox and charge disproportionation reactions involved were derived. A phase transition near the point x approximate to 1.83, which nominally corresponds to one trivalent copper cation per elementary unit, was observed. (C) 1995 Academic Press,Inc.
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收藏
页码：146 / 150
页数：5
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