THERMAL-DECOMPOSITION OF SOME SIDERITE-MAGNESITE MINERALS USING DSC

被引：27

作者：

DUBRAWSKI, JV

机构：

[1] BHP Central Research Laboratories Wallsend, 2287, NSW

来源：

JOURNAL OF THERMAL ANALYSIS | 1991年 / 37卷 / 06期

关键词：

D O I：

10.1007/BF01913855

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Members of the siderite-magnesite series of carbonates have been investigated in nitrogen using differential scanning calorimetry. The mineral specimens contained between 0.3-0.95 mole fraction iron. Decomposition temperatures decreased markedly with increasing Fe substitution. Enthalpies of decomposition showed a linear dependence upon the degree of Fe and Fe + Mn substitution. The fit (R2 = 0.995) in the case of Fe + Mn suggested that DSC can be used to distinguish members of the series. Decomposition products consisted of substituted iron oxides in most cases.

引用

页码：1213 / 1221

页数：9

共 16 条

[1]

ADLER HH, 1963, AM MINERAL, V48, P124

[2]

BERAN A, 1978, NEUES JB MIN MONTASH, V78, P559

[3] THE CALORIMETRIC CALIBRATION OF DIFFERENTIAL SCANNING CALORIMETRY CELLS [J].