Abstract The morphology of ultra-large polyhedra of diamond grown under high pressure and high temperature (5.6 - 5.8 GPa and 1400 - 1700 °C) in a growth system based on Fe-Co was studied. The grown diamond polyhedra are crystals of an octahedral habit with minor faces of a cube, rhombic dodecahedron, and trapezohedrons {311}, {511} and {711}. The morphological features of the grown crystals are the skeletal growth of faces of various simple forms and the so-called “binary growth” of single crystal. The characteristic of these growth phenomena is given and possible reasons for their manifestation are described.

中文翻译：

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温度梯度法生长的2克拉以上金刚石单晶形貌特征

摘要 研究了在基于Fe-Co 的生长系统中在高压和高温（5.6 - 5.8 GPa 和1400 - 1700 °C）下生长的金刚石超大多面体的形貌。生长的金刚石多面体是具有立方体、菱形十二面体和梯形{311}、{511}和{711}的次要面的八面体习性晶体。生长晶体的形态特征是各种简单形式的面的骨架生长和所谓的单晶“二元生长”。给出了这些生长现象的特征，并描述了它们出现的可能原因。