A solid is crystalline if it's got long-range purchase. As soon as the positions of an atom and its neighbours are acknowledged at a single point, the place of every atom is known precisely through the entire crystal. Most liquids deficiency lengthy-variety get, Whilst numerous have small-range purchase. Short vary is described as the initial- or 2nd-nearest neighbours of the atom. In lots of liquids the 1st-neighbour atoms are organized in the same structure as in the corresponding stable section.
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
A fundamental principle in crystal structures is definitely the unit mobile. It is the smallest unit of volume that permits similar cells for being stacked alongside one another to fill all space. By repeating the pattern on the device cell time and again in all directions, your complete crystal lattice is usually constructed. A cube is The only illustration of a unit cell. Two other illustrations are shown in Figure 1. The main is the unit mobile for just a facial Crystal area-centred cubic lattice, and the 2nd is for a system-centred cubic lattice. These constructions are spelled out in the subsequent paragraphs.
Increase to phrase checklist Include to word record C2 [ U ] transparent glass of extremely top quality, typically with its surface Slash into fragile patterns
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
结晶�?When sea h2o is allowed to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
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：
11I very carefully opened the package and found a crystal bell within.我小心地打开包裹，发现里面有一个水晶钟。
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：
看文化：水晶里面的包裹体象形，能与文化、宗教及历史有所牵连的话，价格往往会比水晶本身的价值高出几倍甚至几百倍。
15The trick to a great thermoelectric product can be a crystal construction wherein electrons can circulation freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。
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�?�?。
Tetragonal �?Characterised by 3 mutually perpendicular axes, two of that are equivalent in duration, though the 3rd is for a longer time or shorter and perpendicular to another two.