Crystal for Dummies
Crystal for Dummies
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Not all crystals are equally crystalline. There will often be impurities, as well as the ionic & covalent amongst molecules can produce vastly unique buildings out of the identical material. A great illustration of this are diamonds and graphene.
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
水晶文化历史悠久，古人曾赋予它一串极富美感的雅称：水玉、水精、水碧、石英等。
Fig. three: A library of lattice symmetries may be accessed by modifying the particle Main and DNA shell.
2She was carrying a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
水晶内部有多种矿物包裹体，形成的各种景观可以肉眼观测，这样的水晶就是包裹体水晶观赏石。由于水晶本身就是宝石，因此人们称誉包裹体水晶为“宝石级的观赏石”。包裹体水晶观赏石都具有独特性，具有极高欣赏和收藏价值。
如果水晶内部杂质中有传说中人物的造型，如佛、星座、生肖等价值可能要高于同等颜色和净度的水晶。
Q.four. Exactly what is the difference between atomic structure and crystal construction? Ans. The primary distinction between atomic composition and crystal structure lies of their definitions: atomic construction refers to how atoms are structured in just a solitary molecule or maybe a cluster of molecules, Whilst crystal framework concerns the precise arrangement of atoms in just a sound compound.
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。
From your Cambridge English Corpus We are saying the chain topology during the higher w area acts since the proverbial ' scratch-on-theglass ' wanted during the organic and natural chemistry laboratory to create crystals. Within the Cambridge English Corpus Constant-pressure and temperature molecular-dynamics simulations of crystals with the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. Through the Cambridge English Corpus In combination with these, dust particles are observed in small-temperature plasmas, like those Employed in plasma processing and plasma crystals. In the Cambridge English Corpus The ultimate Portion of the book focuses on peculiarities of strongly coupled dusty plasmas, like the development of dust crystals and involved desirable forces. With the Cambridge English Corpus Full characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Through the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, Key morphologies were not observed. Through the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from sources online. Any viewpoints inside the illustrations do not symbolize the impression with the Cambridge Dictionary editors or of Cambridge College Press or its licensors.
Molecular Crystals: Entire molecules are bonded to each other within an arranged fashion. An excellent example is really a sugar crystal, which incorporates sucrose molecules.
水玉：中国最古老的称法叫水玉，意谓似水之玉，又说是 �?千年之冰所�?�?。唐代诗人温庭筠《题李处士幽居》写道：�?水玉簪头白角巾，瑶琴寂历拂轻�?”。水玉一词最早频繁出于《山海经》：�?又东三百里，日堂庭之�?…�?多水�?”；�?丹山出焉，东南流注于洛水，其中多水玉 ”；�?逐水出焉，北流注于渭，其中多水玉 ”。司马相如《上林赋》曰�?�?水玉磊河 �?。水晶得名水玉，古人是看�?�?其莹如水，其坚如�?�?的质地。
crystal Alteration is variable: absent in lots of crystals, in Some others developing dense sericite aggregates which may clearly show some recrystallization consequences to create coarser-grained white mica. In the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes arranged in aggregates. Within the Cambridge English Corpus On top of that, haloarchaeal cells were being embedded in salt crystals beneath laboratory problems and subsequently analysed by gentle microscopy. From your Cambridge English Corpus The white clouds (ordinarily sparse) were being also broadly viewed as getting made up of very small crystals of drinking water ice, rather like cirrus within our ambiance. In the Cambridge English Corpus They are really found in evaporite salt lakes and can be trapped in salt crystals in the course of evaporation. Within the Crystal Cambridge English Corpus As a result, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to death by way of cell lysis. From the Cambridge English Corpus The crystals were used in the first or second orders of reflection. Through the Cambridge English Corpus Within our 8xperiments, the crystals ended up cubes with a base spot of eight e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : influence of temperature and force.