由于低温板状晶体合成区间很窄，因此较中温和高温晶体的合成相对困难。
Because the low temperature synthesis rang is very narrow, it is rather difficult to synthesize the plate of gem diamond than the higher temperature gem diamond.
车轮矿晶体，属斜方晶系，呈短柱状和板状，性脆，具有金属光泽，常呈钢灰色至暗铅灰色。
Bournonite crystals belong to the orthorhombic form of short columnar and plate, brittle, with metallic luster, often Chenggang grey to dark grey.
板状的晶体就是平的。
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