Crystal Fundamentals Explained
Crystal Fundamentals Explained
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A stable is crystalline if it's lengthy-array buy. As soon as the positions of an atom and its neighbours are acknowledged at one position, the put of each atom is known exactly all over the crystal. Most liquids absence very long-vary purchase, although numerous have quick-assortment order. Short array is described as the very first- or 2nd-closest neighbours of an atom. In lots of liquids the 1st-neighbour atoms are arranged in precisely the same construction as within the corresponding reliable phase.
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。
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
水碧：《山海经》中，水晶又被称作水碧： �?又南三百里，日耿山，无草木，多水碧 �?，郭璞注�?�?亦水玉类 ”。这种称谓常被文人所引用，晋代郭景纯《璞江赋》道�?�?鬼，水碧�?�?。水晶又有人称它叫玉瑛。《符瑞图》载�?美石似玉，水精谓之玉瑛也�?”
水胆水晶，包括气态，液态，固态，有时候可以同时多态并存，无色居多，个别情况下可见红色，绿色，黄色，蓝色，黑色等。
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Increase to term list Insert to word listing [ C/U ] transparent rock that looks like ice, or even a bit of it
26Some of the best drinking Eyeglasses are constructed from direct 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》
Q.4. What is the distinction between atomic construction and crystal composition? Ans. The first difference between atomic composition and crystal structure lies in their definitions: atomic composition refers to how atoms are arranged within a single molecule or a cluster of molecules, Whilst crystal construction problems the precise arrangement of atoms within a sound material.
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看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
压电性：水晶晶体受到压力时会产生电荷；反之，受到电压作用时，晶体会产生频率很高的振动。水晶具有可使压力与电荷相互转移的性能，称压电性。
crystal Alteration is variable: absent in lots of crystals, in Other folks making dense sericite aggregates which can demonstrate some recrystallization consequences to provide coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are sometimes organized in aggregates. In the Cambridge English Corpus Also, haloarchaeal cells were being embedded in salt crystals less than laboratory conditions and subsequently analysed by gentle microscopy. From your Cambridge English Corpus The white clouds (generally sparse) have been also broadly considered to be getting made up of little crystals of water ice, fairly like cirrus in our atmosphere. With the Cambridge English Corpus They're located in evaporite salt lakes and might be trapped in salt crystals during evaporation. Within the Cambridge English Corpus For that reason, the cells (organelles and membranes) are destroyed mechanically by ice crystals, bringing more info about Demise via cell lysis. From your Cambridge English Corpus The crystals were being Utilized in the primary or second orders of reflection. From your Cambridge English Corpus Inside our 8xperiments, the crystals have been cubes with a foundation location of 8 e mm. From your Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and tension.