By Evjen crystal cell, the calculation formula about Madelung constant for the two-dimensional trigonal ion crystal was deduced.
采用埃夫琴晶胞推导了计算二维三角离子晶体的马德隆常数的通项公式。
The crystal structure has been determined by X ray single crystal diffraction, showing a distorted trigonal bipyramidal configuration with five coordination for the central tin atom.
通过元素分析、 红外光谱和氢核磁共振谱对其结构进行了表征。用X-射线单晶衍射测定了该化合物的晶体结构。
This reflects the change of the crystal-habit of the trigonal trapezohedron simple form in synthetic smoky quartz.
这种变化反映了人工烟水晶三方偏方面体单形结晶习性的变化。
This reflects the change of the crystal-habit of the trigonal trapezohedron simple form in synthetic smoky quartz.
这种变化反映了人工烟水晶三方偏方面体单形结晶习性的变化。
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