THE BEST SIDE OF CRYSTAL

Not all crystals are equally crystalline. There are sometimes impurities, along with the ionic & covalent concerning molecules can make vastly unique constructions from a similar materials. A great illustration of this are diamonds and graphene.①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电