Fascination About Crystal
Fascination About Crystal
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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。
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。
天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。
Most solid components present in nature exist in polycrystalline form in lieu of as just one crystal. They are literally made up of numerous grains (compact crystals) packed collectively to fill all Place. Each unique grain has a distinct orientation than its neighbours. Though lengthy-vary order exists inside of 1 grain, on the boundary in between grains, the purchasing adjustments course. A typical bit of iron or copper (Cu) is polycrystalline.
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
Intelligent Vocabulary: linked phrases and phrases Glass blower blowpipe bulletproof glass cut glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See more effects » You may as well discover relevant phrases, phrases, and synonyms from the subject areas:
时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：
The elements are located in many different crystal packing arrangements. The most typical lattice structures for metals are Individuals obtained by stacking the atomic spheres into probably the most compact arrangement.
Among the binary crystals, the best structures to visualize are These with equal quantities of The 2 sorts of atoms. The composition of sodium chloride is predicated on the dice. To construct the lattice, the sodium and chlorine atoms are placed on alternate corners of the cube, plus the structure is repeated (Determine 3B).
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。
16I opened the box and noticed a bit of crystal snowflake plus a greeting card with "Pleased Birthday" in the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
You can find only some distinct device-mobile shapes, so numerous crystals share just one unit-cell variety. A very important characteristic of a unit mobile is the quantity of atoms it has. The total number of atoms in your entire crystal may be the variety in Just about every cell multiplied by the quantity of unit cells. Copper and aluminum (Al) Just about every have just one atom for every unit cell, although zinc (Zn) and sodium chloride have two. Most crystals have only a few atoms per unit mobile, but there are a few exceptions. Crystals of polymers, click here for example, have Countless atoms in Every single unit mobile.
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。
This crystal structure is liable for the exclusive Actual physical and chemical Homes of sodium chloride, which includes its large melting position, electrical conductivity, and talent to kind ionic bonds conveniently.