About Crystal
About Crystal
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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
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。
A crystal composition concentrates on how the atoms are arranged Within the crystal. Having said that, crystallographers have an interest in the general form and dimension with the crystal and also its exterior attributes. To accomplish this, they have to understand about the crystal process.
Most good components present in mother nature exist in polycrystalline kind rather than as one crystal. They are actually made up of an incredible number of grains (modest crystals) packed alongside one another to fill all Place. Each person grain has a distinct orientation than its neighbours. Even though very long-selection get exists within one particular grain, on the boundary in between grains, the ordering improvements way. A typical bit of iron or copper (Cu) is polycrystalline.
. These 4 structures comprise almost all of the binary crystals with equal numbers of cations and anions.
Intelligent Vocabulary: relevant words and phrases and phrases Glass blower blowpipe bulletproof glass Slash glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See extra outcomes » You may as well come across linked phrases, phrases, and synonyms while in the topics:
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
Hexagonal �?Characterized by 4 axes, 3 of which can be equal in size and intersect at 120 degrees, which has a fourth axis perpendicular to the other 3.
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：
晶体 Silicon crystals grown inside of a laboratory transform light-weight into electrical energy. 在实验室中长成的硅晶体可将光线转变为电能。
Solitary crystals of metals are soft and malleable, when polycrystalline metals are more difficult and much better and are more valuable industrially. Most polycrystalline products can be created into substantial solitary crystals following prolonged warmth treatment method. Before blacksmiths would warmth a bit of metallic to really make it malleable: heat makes a few grains mature substantial by incorporating more compact kinds. The smiths would bend the softened steel into form after which you can pound it awhile; the pounding would ensure it is polycrystalline get more info once more, rising its power.
Crystals are not simply renowned for his or her Actual physical overall look, but distinct crystals of various materials and formations may end up in an unlimited variety of utilizes and physical properties.
This Assessment chronicles more than twenty years of exploration into creating a genetic code for crystal engineering. As opposed to directing biological procedures, this code makes use of artificial types of DNA to programme the assembly of nanoparticles and microparticles into 1D, 2D and 3D crystalline architectures, in which almost each facet of the resultant structures might be systematically managed. In this conceptual framework, the structural and useful improvements are explained in an effort to determine the current standard of sophistication also to predict long run directions from the System.
The C60 molecules, also called buckyballs, are pretty powerful and Just about incompressible. Crystals are fashioned these the balls are organized in an fcc lattice with a a person-nanometre spacing involving the centres of adjacent balls. The comparable C70 molecule has the shape of a rugby ball; C70 molecules also kind an fcc crystal when stacked alongside one another. The solid fullerenes kind molecular crystals, with weak binding—furnished by van der Waals interactions—concerning the molecules.