298～873K条件下方铅矿的热膨胀系数:理论与实验的对比

THERMAL EXPANSION OF GALENA-THEORETICAL AND EXPERIMENTAL COMPARISON

用Ruffa法和作者提出的修正Ruffa法,分别对共价键性明显的方铅矿的热膨胀系数进行了计算。通过方铅矿高温X射线衍射实验,对298～873K条件下热膨胀系数的计算结果进行了验证。结果表明,对共价键性明显的矿物,修正Ruffa法比Ruffa法具有更高的计算精度。

Thermalexpansion coefficients of galena which has strong covalent characteristicsare calculated by using the Ruffa method and revised Ruffa method, and are compared with the experimental data obtained by high-temperature XRD. The comparison shows that the thermal expansion coefficient calculated by using the revised Ruffa method is closer to the experimental one calculated with the Ruffa method, which displays the possibility of application of the revised Ruffa method to covalent crystals.