雪晶是按照两种形状中的一种？？板状和圆柱形形成的。

Snow crystals grow in one of two designs? Platelike and columnar.

youdao

结果表明，单个出现的凸透镜状粗大孪晶为(102)，平行排列的板状孪晶为(112)，孪晶内存在高密度位错。

The results shown that the single big twin like convex is (102) and the twin parallel arranged is (112), high density of dislocation existed in twin.

youdao

当钾长石在斑状、似斑状岩石中构成斑晶时，常呈板状、板柱状自形的晶体。

When the potassium feldspar phenocrysts in porphyritic porphyritic rocks, like in form, often with a plate, plate columnar euhedral crystals.

youdao