This concept applies equally in a single, two, and 3-dimensional Areas. Your entire crystal lattice might be made by consistently reproducing the sample from the device mobile in all directions.
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，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
Chemical Bonds The kinds of chemical bonds formed among atoms or teams of atoms in crystals depend on their sizing and electronegativity. You can find four groups of crystals as grouped by their bonding:
Most good products found in character exist in polycrystalline type as an alternative to as a single crystal. They are actually composed of millions of grains (little crystals) packed with each other to fill all House. Every individual grain has a special orientation than its neighbours. Although lengthy-vary order exists in just a single grain, with the boundary concerning grains, the purchasing changes path. A standard bit of iron or copper (Cu) is polycrystalline.
You can also find numerous supplies that resemble crystals but are literally polycrystals. Polycrystals sort when microscopic crystals fuse collectively to kind a stable. These materials usually do not consist of requested lattices.
第二种是“半包裹体”，在水晶结晶以后，由于受到地球引力的影响而产生的裂隙，晶体外的一些物质通过水晶的裂隙渗透到水晶内部，一部分包裹于水晶之中另一部分露于水晶之外。我们可以看到物质渗进水晶的裂迹，常被称为“通道”，这种包裹体所形成的景象相对地较受自然环境和时间的影响，相应的价值也比较�?。
⑦、镀彩：运用类似电镀的手法在水晶表面以不同的色彩，层面较薄，经摩擦可划伤�?；出现划痕，由于镀彩经常位于底部，因此在镀彩底部经常采用其它对象附着，如生肖文镇。
Crystals may be developed below average problems from all ninety two Normally occurring features other than helium, and helium can be crystallized at very low temperatures by using 25 atmospheres of stress.
Q.four. What's the distinction between atomic construction and crystal composition? Ans. The first difference between atomic composition and crystal construction lies of their definitions: atomic structure refers to how atoms are organized within a one molecule or even a cluster of molecules, whereas crystal construction fears the specific arrangement of atoms in a good substance.
⑤化学稳定�?非常好，在常温下仅溶解于氢氟酸，不溶解于其它各类酸、碱。在高温高压条件下可溶解于碳酸钠溶液中。
看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。
水晶的价值还与块体大小有关，同样的颜色和净度级别，块越大越难得。有时候质量级别虽然低一些，但块体够大，也可能价格高于高级别的小晶体
水晶饰品越来越受到人们的喜爱。中国、日本、韩国、美国等国家的人们还对水晶球情有独钟，喜欢将它们摆在家里或办公室里，认为水晶球有灵性，能保平安，带来财运。不过天然水晶不像看起来那么晶莹剔透，它也有瑕疵，我们在选购饰品的时候要注意。此外，我们还要掌握水晶的评价依据、选购方法，这样可以帮助我们在琳琅满目的水晶饰品中选到心仪的水晶。
Yet another sort of crystalline carbon is based on the molecule with sixty carbon atoms known as buckminsterfullerene (C60). The molecular shape is spherical. Each carbon is bonded to 3 neighbours, as in graphite, and also the spherical shape is realized by a mix of 12 rings with 5 sides and twenty rings with 6 sides. website Very similar constructions ended up first visualized by the American architect R. Buckminster Fuller for geodesic domes.