Not all crystals are Similarly crystalline. There will often be impurities, along with the ionic & covalent concerning molecules can make vastly various constructions out of the same material. An awesome 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。
A basic notion in crystal constructions is the unit cell. It's the smallest device of volume that allows similar cells to generally be stacked together to fill all House. By repeating the pattern on the unit cell again and again in all Instructions, your entire crystal lattice is usually manufactured. A cube is the simplest illustration of a unit cell. Two other illustrations are revealed in Figure one. The first is definitely the unit mobile for a deal with-centred cubic lattice, and the next is for any physique-centred cubic lattice. These structures are explained in the following paragraphs.
第一种是“全包裹体”，在水晶结晶的时候把这些物质包裹在晶体里面，这类包裹体所形成的各种景象，大多保持了水晶结晶时的原状，也就是说保存了几亿年的原状，极少受到自然环境的影响。
水胆水晶，包括气态，液态，固态，有时候可以同时多态并存，无色居多，个别情况下可见红色，绿色，黄色，蓝色，黑色等。
Find out how the shape on the crystals determine different minerals into familiesMinerals crystallize Based on amongst seven motifs, generally known as crystal techniques.
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
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水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：
广义的包裹体是指宝石内部含有的与主晶宝石化学成分、物理性质等不同的物质。
天然性是水晶观赏石的基本特性。通常整体造型水晶矿物不饰雕琢就具备很高的观赏价值，但是包裹体水晶观赏石经常需要适当打磨抛光，这样更方便观赏水晶内部的包裹体。
The sodium chloride crystal lattice is characterised from the near packing with the favourable sodium ions and destructive chloride ions. Every single sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by six sodium ions, developing a hugely secure and symmetrical construction.
水精：水晶为何称为水精，《广雅》有巧解：�?水之精灵�?”；李时珍则说：�?莹洁晶光，如水之精英 ”。细加考究，此称还蕴含浓厚的宗教意味呢。水精一名，最初见于佛书，后汉支曜翻译的《具光明定意经》说：�?其所行道，色如水�?�?。
crystal Alteration is variable: absent in lots of crystals, in Other folks creating dense sericite aggregates which may display some recrystallization results to produce coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are sometimes arranged in aggregates. From the Cambridge English Corpus Furthermore, haloarchaeal cells had been embedded inside of salt crystals under laboratory circumstances and subsequently analysed by light-weight microscopy. In the Cambridge English Corpus The white clouds (ordinarily sparse) had been also extensively considered currently being composed of small crystals of water ice, rather like cirrus inside our atmosphere. Within the Cambridge English Corpus click here They can be located in evaporite salt lakes and will be trapped in salt crystals during evaporation. Within the Cambridge English Corpus Consequently, the cells (organelles and membranes) are destroyed mechanically by ice crystals, bringing about Demise by cell lysis. Within the Cambridge English Corpus The crystals ended up used in the primary or next orders of reflection. From the Cambridge English Corpus In our 8xperiments, the crystals were cubes with a foundation space of 8 e mm. Through the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : effect of temperature and force.