The Basic Principles Of Crystal
The Basic Principles Of Crystal
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A sound is crystalline if it has very long-assortment purchase. Once the positions of the atom and its neighbours are known at one particular stage, the put of each and every atom is thought precisely through the entire crystal. Most liquids absence long-assortment purchase, Even though quite a few have short-array get. Short assortment is defined as the primary- or 2nd-closest neighbours of an atom. In lots of liquids the initial-neighbour atoms are organized in the same construction as during the corresponding strong section.
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人造水晶分为熔炼水晶与养殖晶：据水晶专家汪毅的阐述，随着水晶的价值提高，喜欢的人增多，水晶也引起了作伪者的兴趣，现阶段中国水晶市场常见的造假方法为：
Tetragonal: These crystals sort prisms and double pyramids. The structure is sort of a cubic crystal, besides a single axis is for a longer time than one other.
C2 [ U ] transparent glass of really high-quality, usually with its area Slice into delicate designs:
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
13Nearly all desktops consist of a quartz-crystal clock to manage their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
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。
地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。
There are only a few unique device-mobile designs, so many various crystals share a single device-cell variety. An important characteristic of the unit cell is the quantity of atoms it contains. The entire amount of atoms in the whole crystal could be the range in Every single cell multiplied by the quantity of device cells. Copper and aluminum (Al) Just about every have just one atom per device mobile, while zinc (Zn) and sodium chloride have two. Most crystals have only some atoms per unit cell, but there are many exceptions. Crystals of polymers, one example is, have Countless atoms in each unit mobile.
《古今小说·李公子救蛇获称心》：“器皿皆是玻璃、水晶、琥珀、玛瑙为之，曲尽巧妙，非人间所有。”
crystal Alteration is variable: absent in several crystals, in Some others manufacturing dense sericite aggregates which can display some recrystallization outcomes to make coarser-grained white mica. From the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes organized in aggregates. Within the Cambridge English Corpus Additionally, haloarchaeal cells have been embedded in salt crystals under laboratory situations and subsequently analysed by gentle microscopy. Through the Cambridge English Corpus The white clouds (typically sparse) were also greatly considered to be being composed of tiny crystals of water ice, fairly like cirrus within our ambiance. From the Cambridge English Corpus They are really found in evaporite salt lakes and will be trapped in salt crystals for the duration of evaporation. From the Cambridge English Corpus As a result, the cells (organelles and membranes) are ruined mechanically by ice crystals, resulting in death as a result of mobile lysis. From the Cambridge English website Corpus The crystals had been used in the first or 2nd orders of reflection. Through the Cambridge English Corpus Within our 8xperiments, the crystals ended up cubes which has a foundation place of eight e mm. From your Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and force.