Studies on synthesis, characterization and thermochemistry of Mg2[B2O4(OH)2]•H2O

被引：12
|
作者：
Zhihong, L [1 ]
Mancheng, H [1 ]
Shiyang, G [1 ]
机构：
[1] Shaanxi Normal Univ, Sch Chem & Mat Sci, Xian 710062, Peoples R China
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2004年 / 75卷 / 01期
关键词：
Mg-2[B2O4(OH)(2)]H2O; solution calorimetry; standard molar enthalpy of formation; synthesis;
D O I：
10.1023/B:JTAN.0000017329.58812.20
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A new magnesium borate Mg-2[B2O4(OH)(2)] . H2O has been synthesized by the method of phase transformation of double salt at hydrothermal condition and characterized by XRD, IR, TG and DSC. The enthalpy of solution of Mg-2[B2O4(OH)(2)] . H2O in 0.9764 mol L-1 HCl was determined. With the incorporation of the enthalpies of solution of H3BO3 in HCl (aq), of MgO in (HCl+H3BO3) (aq), and the standard molar enthalpies of formation of MgO(s), H3BO3(s), and H2O(l), the standard molar enthalpy of formation of -(3185.78 +/- 1.91) kJ mol(-1) of Mg-2[B2O4(OH)(2)] . H2O was obtained.
引用
收藏
页码：73 / 78
页数：6
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