The smart Trick of Crystal That No One is Discussing
The smart Trick of Crystal That No One is Discussing
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27Local economists have seemed into their crystal balls and witnessed some thing relatively nasty.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
4Without a crystal ball, It really is not possible to mention exactly where we are going to be following calendar year.不用水晶球预卜未来，我们说不准明年处境如何呀。《牛津词典》
Fig. three: A library of lattice symmetries is usually accessed by changing the particle Main and DNA shell.
看抛光：抛光的好坏直接影响到水晶制品的身价。抛光分为软抛光与硬抛光。
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。
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。
26Some of the finest ingesting Eyeglasses are produced from lead crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
13Nearly all personal computers have a quartz-crystal clock to regulate 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。
Crystals with noticeable flat faces are termed euhedral crystals, while Individuals missing defined faces are identified as anhedral crystals. Crystals consisting of requested arrays of atoms that are not usually periodic are named more info quasicrystals.
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。
Crystallography could be the research of crystals, and it bargains with every thing from perfect geometric styles to seemingly random conglomerations of particles and minerals.
The framework on the sodium atoms alone, or maybe the chlorine atoms by itself, is fcc and defines the device mobile. The sodium chloride construction Therefore is built up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) relies around the bcc construction; each other atom is cesium or chlorine. In this case, the unit cell is usually a cube. The 3rd crucial structure for AB
水晶观赏石是天然水晶中最具代表的作品，具有其他宝石都不具备的观赏性。不论是玉石翡翠还是都要经过雕琢后次能体现他的价值，而水晶观赏石只需要将表面进行抛光，即展现出晶体内所包裹的物质，直接欣赏原汁原味的水晶石。