The Basic Principles Of Crystal
The Basic Principles Of Crystal
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Not all crystals are Similarly crystalline. There in many cases are impurities, and also the ionic & covalent in between molecules can make vastly different constructions from precisely the same content. A fantastic 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。
Chemical Bonds The kinds of chemical bonds shaped amongst atoms or teams of atoms in crystals depend upon their sizing and electronegativity. There are 4 types of crystals as grouped by their bonding:
Tetragonal: These crystals kind prisms and double pyramids. The framework is sort of a cubic crystal, besides 1 axis is extended than the opposite.
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
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。
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
You will find there's related directive about crystal glass which differentiates concerning whole guide crystal, lead crystal and crystal.
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。
All crystal ball crystal clear copyright liquid crystal crystal lattice crystal structure liquid crystal display See all meanings Idioms and phrases crystal clear idiom
Molecular Crystals: Complete molecules are bonded to each other in an arranged fashion. A fantastic instance Crystal can be a sugar crystal, which is made up of sucrose molecules.
水晶饰品越来越受到人们的喜爱。中国、日本、韩国、美国等国家的人们还对水晶球情有独钟，喜欢将它们摆在家里或办公室里，认为水晶球有灵性，能保平安，带来财运。不过天然水晶不像看起来那么晶莹剔透，它也有瑕疵，我们在选购饰品的时候要注意。此外，我们还要掌握水晶的评价依据、选购方法，这样可以帮助我们在琳琅满目的水晶饰品中选到心仪的水晶。
The C60 molecules, also known as buckyballs, are really strong and Just about incompressible. Crystals are fashioned these kinds of the balls are organized within an fcc lattice having a just one-nanometre spacing amongst the centres of adjacent balls. The very similar C70 molecule has the shape of a rugby ball; C70 molecules also sort an fcc crystal when stacked together. The reliable fullerenes variety molecular crystals, with weak binding—provided by van der Waals interactions—in between the molecules.