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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。the solid state of many basic substances, that have a regular form and surfaces arranged in related stylesChemical Bonds The cat