A Simple Key For Crystal Unveiled

A Simple Key For Crystal Unveiled

Blog Article

Not all crystals are Similarly crystalline. There in many cases are impurities, along with the ionic & covalent amongst molecules can produce vastly distinct structures from precisely the same materials. An incredible example 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。

Encyclopaedia Britannica's editors oversee subject spots during which they may have extensive know-how, no matter whether from a long time of working experience received by working on that material or by means of review for a complicated degree. They create new articles and verify and edit written content been given from contributors.

You will find many various crystals depending on geometric buildings, crystal development, and content. There could be preparations of hexagonal carbon atoms or amethyst which makes hexagonal pyramid structures.

当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。

解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。

26Some of the finest consuming glasses are made from direct crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》

水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。

A Crystal crystal process refers back to the classification of crystals depending on the geometric arrangement and symmetry of their lattice buildings. You will find 7 principal crystal devices:

The essential units of solids are both atoms or atoms which have mixed into molecules. The electrons of an atom go in orbits that form a shell composition around the nucleus. The shells are crammed in a systematic buy, with Every shell accommodating only a little range of electrons. Unique atoms have distinctive numbers of electrons, which can be distributed within a attribute electronic structure of loaded and partly loaded shells.

正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（growth lines）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。

⑤、打孔：是在水晶成品未完成前，根据其所需打孔之尺寸及位置，以钻头加工，如制表件、笔筒、瓶孔等。

Tetragonal �?Characterised by three mutually perpendicular axes, two of which are equivalent in length, even though the 3rd is extended or shorter and perpendicular to one other two.