Melting Curve of Molecular Crystal GeI 4
Melting Curve of Molecular Crystal GeI 4
复制标题
分子晶体 GeI 4 的熔解曲线
DOI：
10.7566/jpsj.83.074603
复制
发表时间：
2014
影响因子：
1.7
通讯作者：
N. Hamaya
中科院分区：
文献类型：
--
作者：
K. Fuchizaki;N. Hamaya
采用同步x射线衍射法测定了分子晶体GeI4的熔化曲线。我们发现，当压力达到约3gpa时，熔化线迅速增加，并突然断裂。这种强烈的非线性熔化曲线形状可以用Kumari-Dass-Kechin方程近似地描述。方程中涉及的参数可以由本研究中建立的结晶相状态方程确定。由于得到方程的近似程度提高，由方程预测的熔化曲线更接近实际熔化曲线。然而，只有当熔化曲线的斜率处处连续时，这种处理才是合理的。我们认为，从kaut - kennedy关系和magalinsky - zubov关系破裂的性质推断，GeI4在断点处的熔化线不是这种情况。断点可能是在…
In situ synchrotron x-ray diffraction measurements were carried out to determine the melting curve of the molecular crystal GeI4. We found that the melting line rapidly increases with a pressure up to about 3 GPa, at which it abruptly breaks. Such a strong nonlinear shape of the melting curve can be approximately captured by the Kumari–Dass–Kechin equation. The parameters involved in the equation could be determined from the equation of state for the crystalline phase, which was also established in the present study. The melting curve predicted from the equation approaches the actual melting curve as the degree of approximation involved in obtaining the equation is improved. However, the treatment is justifiable only if the slope of the melting curve is everywhere continuous. We believe that this is not the case for GeI4’s melting line at the breakpoint, as inferred from the nature of breakdown of the Kraut–Kennedy and the Magalinskii–Zubov relationships.The breakpoint may then be a triple point among the...