5 SIMPLE TECHNIQUES FOR CRYSTAL

Not all crystals are equally crystalline. There will often be impurities, plus the ionic & covalent involving molecules can generate vastly diverse structures outside of the exact same substance. An awesome example of this are diamonds and graphene.杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状�