Not known Facts About Crystal
Not known Facts About Crystal
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天然的水晶一般都会有絮状（绵绺），也就是大家俗称的瑕疵，这是液体水落石出和二氧化碳的小孔穴，而人工合成的水晶就不会有这样的特征。
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。
水晶文化历史悠久，古人曾赋予它一串极富美感的雅称：水玉、水精、水碧、石英等。
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�?”
2She was putting on a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
第二种是“半包裹体”，在水晶结晶以后，由于受到地球引力的影响而产生的裂隙，晶体外的一些物质通过水晶的裂隙渗透到水晶内部，一部分包裹于水晶之中另一部分露于水晶之外。我们可以看到物质渗进水晶的裂迹，常被称为“通道”，这种包裹体所形成的景象相对地较受自然环境和时间的影响，相应的价值也比较�?。
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As a warm solution cools or possibly a saturated Answer evaporates, particles draw close sufficient for chemical bonds to form. Crystals also can kind from deposition directly from the fuel phase. Liquid crystals possess particles oriented within an arranged way, like stable crystals, nonetheless are able to move.
水晶包裹体丰富多彩，从气体、液体到各种矿物质，甚至宝石，均可被包含于水晶内，各种包裹体所形成的景象更是变化万千。按照包裹体的内容，常把包裹体水晶分为一下八类：
颜色：无色，浅至深的紫色，浅黄、中至深黄色，浅至深褐、棕色，绿至黄绿色，浅至中粉红。
All crystal ball crystal crystal clear copyright liquid crystal crystal lattice crystal composition liquid crystal Display screen See all meanings Idioms and phrases crystal distinct idiom
The sodium chloride crystal lattice is characterised from the near packing from the positive sodium ions and negative chloride ions. Each sodium ion is surrounded by 6 chloride ions, and every chloride ion is surrounded by six sodium ions, creating a very secure and symmetrical composition.
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crystal Alteration is variable: absent in lots of crystals, in Other individuals making dense sericite aggregates which may demonstrate some recrystallization outcomes to create coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes organized in aggregates. Within the Cambridge English Corpus In addition, haloarchaeal cells were embedded in salt crystals less than laboratory conditions and subsequently analysed by light-weight microscopy. Within the Cambridge English Corpus The white clouds (generally sparse) were being also greatly considered being made up of little crystals of h2o ice, somewhat like cirrus within our atmosphere. From the Cambridge English Corpus They can be present in evaporite salt lakes and can be trapped in salt crystals all through evaporation. From your Cambridge English Corpus Hence, the cells (organelles and membranes) are destroyed mechanically by ice crystals, resulting in Dying through cell lysis. From the Cambridge English Corpus The crystals were Employed in the initial or next orders of reflection. From the Cambridge English Corpus Within our 8xperiments, the crystals were being cubes using a foundation location of 8 e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : here effect of temperature and stress.