Facts About Crystal Revealed
Facts About Crystal Revealed
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诗中“胜美玉”，“过冰清”，写出水晶的质地美，而“亦欲应时明”则描绘出水晶充满灵性的动态美，耐人寻味。罗维是有独特眼光，懂得水晶真谛，第一个称赞水晶超过美玉的伟大诗人。他的认识已被千年之后的科学理论所证实；以水晶为直接吟咏对象的诗篇还有：
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。
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
Most stable elements located in character exist in polycrystalline variety instead of as an individual crystal. They are actually made up of an incredible number of grains (smaller crystals) packed with each other to fill all House. Just about every particular person grain has another orientation than its neighbours. While extensive-vary buy exists in just a single grain, within the boundary amongst grains, the ordering improvements way. An average bit of iron or copper (Cu) is polycrystalline.
There are a variety of crystals determined by geometric constructions, crystal advancement, and product. There is often preparations of hexagonal carbon atoms or amethyst that makes hexagonal pyramid constructions.
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。
⑦、镀彩：运用类似电镀的手法在水晶表面以不同的色彩，层面较薄，经摩擦可划伤�?；出现划痕，由于镀彩经常位于底部，因此在镀彩底部经常采用其它对象附着，如生肖文镇。
发晶：无色、浅黄、浅褐等，可因含金红石常呈金黄、褐红等色，含电气石常呈灰黑色；含阳起石而呈灰绿色。
Among the binary crystals, the simplest constructions to visualize are These with equivalent numbers of the two forms of atoms. The composition of sodium chloride is predicated over a cube. To construct the lattice, the sodium and chlorine atoms are put on alternate corners of a dice, plus the structure is repeated (Figure 3B).
crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique towards the shear band margins, defining a standard grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology inside the substantial w region functions given that the proverbial ' scratch-on-theglass ' needed during the natural and organic chemistry laboratory to generate crystals. 来自 Cambridge English Corpus The age scatter among the the individual crystals may well reflect incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene kinds neutral to pale brown, subhedral to anhedral crystals, often containing inclusions of plagioclase microlaths and opaque phases.
One crystals of metals are delicate and malleable, whilst polycrystalline metals are tougher and more robust and are more useful industrially. Most polycrystalline components might be manufactured into significant solitary crystals following prolonged warmth remedy. Prior to now blacksmiths would heat a bit of steel to make it malleable: warmth can make a handful of grains expand massive by incorporating smaller sized kinds. The smiths would bend the softened metallic into shape and after that pound it awhile; the pounding would help it become polycrystalline once more, escalating its strength.
Crystallography may be the study of crystals, and it specials with everything from fantastic geometric shapes to seemingly random conglomerations of particles and minerals.
This Critique chronicles more than twenty years of research into creating a genetic code for read more crystal engineering. Instead of directing biological procedures, this code makes use of artificial varieties of DNA to programme the assembly of nanoparticles and microparticles into 1D, 2D and 3D crystalline architectures, in which nearly every facet of the resultant constructions may be systematically controlled. In this conceptual framework, the structural and purposeful advances are explained in order to determine the present level of sophistication also to forecast long run Instructions on the platform.
Fig. five: The ability to realize outlined crystal routines is depending on the symmetry engineering strategy.