Heat Capacity of Pb10 - xLax(GeO4)2 + x(VO4)4 - x (x=0, 1, 2, 3) Apatites in the Range 320-1000 K

被引：4
|
作者：
Denisova, L. T. [1 ]
Kargin, Yu. F. [2 ]
Golubeva, E. O. [1 ]
Belousova, N. V. [1 ]
Denisov, V. M. [1 ]
机构：
[1] Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Svobodnyi Pr 7, Krasnoyarsk 660041, Russia
[2] Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119991, Russia
来源：
INORGANIC MATERIALS | 2019年 / 55卷 / 02期
关键词：
apatites; differential scanning calorimetry; high-temperature heat capacity; thermodynamic properties; PB5(GEO4)(VO4)2; REFINEMENT; STRONTIUM;
D O I：
10.1134/S002016851902002X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pb10 - La-x(x)(GeO4)(2) (+) (x)(VO4)(4) (-) (x) (x = 0, 1, 3) compounds with the apatite structure have been prepared by solid-state reactions via multistep firing of appropriate oxide mixtures in air in the temperature range 773-1073 K. The heat capacity of the synthesized polycrystalline samples has been determined by differential scanning calorimetry. The experimental C-p(T) data have been used to evaluate the thermodynamic properties of the lead lanthanum germanatovanadates: enthalpy increment, entropy change, and reduced Gibbs energy.
引用
收藏
页码：162 / 166
页数：5
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