Heat Capacities and Thermodynamic Properties of the Pyrrhotites FeS and Fe
Heat Capacities and Thermodynamic Properties of the Pyrrhotites FeS and Fe
复制标题
磁黄铁矿 FeS 和 Fe 的热容和热力学性质
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
F. E.
中科院分区：
文献类型：
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作者：
F. E.
测量了两种磁黄铁矿在均匀性范围富铁极限（Fel.OooS）和富硫极限（Feo.mS）下5 ~ 350 K的热容。热容曲线遵循正常的S形，除了Fel.OooS在300 K以上有上升趋势，FeO. 877 S在8和30°K附近有两个小而宽的驼峰。从这些数据的熵和焓函数计算。在298.15°K时，对于Fcl. 000 S，Cp、S°-50°和（HO-HoO）IT的值分别为12.08、14.415和7.496 caI/mole oK;对于Fe 0.877S，Cp、S °-50 °和（HO-HoO）IT的值分别为11.92、14.529和7.396 caI/mole oK。在58 ~ 296°K范围内，FeS的值比文献中先前报道的值低约10%。
Heat capacities were measured from 5 to 350 K for two pyrrhotites at the iron-rich limit (Fel.OooS) and the sulfur· rich limit (Feo.mS) of the homogeneity range. The heat-capacity curves follow the normal sigmoid shape with the exception of an upward trend for Fel.OooS above 300 K, and two small, broad humps for FeO.877S near 8 and 30°K. From these data the entropy and enthalpy functions were calculated. At 298.15°K the values of Cp , S°-50°, and (HO-HoO) IT are 12.08, 14.415, and 7.496 caI/mole oK, respectively, for Fcl.OooS, and 11.92, 14.529, and 7.396 caI/mole oK for Feo.877S. The values on FeS are lower by approximately 10% over the range 58 to 296°K than those previously reported in the literature.