The best Side of Crystal
The best Side of Crystal
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李商隐，杜牧，白居易，欧阳修，苏轼，呈大昌，辛弃疾，杨万里，吴文英，杨基，魏源等诗坛，词林大家都有歌吟水晶的佳篇传世。
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。
These developments consist of exotic buildings with programmable lattice symmetries and effectively-outlined crystal routines, responsive supplies that leverage the intrinsic properties of nucleic acids to manipulate buildings on desire, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals that supply insights into gentle–subject interactions. Searching ahead, we challenge the Local community to leverage the extraordinary structural Handle afforded by crystal engineering with DNA to synthesize courses of practical resources that thrust beyond what has actually been doable with In a natural way developing crystalline materials or These made by far more common procedures.
看原料：选料精良的水晶制品，应看不到胶口及棉絮；质地纯净、光润、晶莹为好。
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。
发晶，包括钛晶，铜顺发，绿发晶，黑发晶，银发晶，杂色发晶，其中钛晶最珍贵，少数钛晶价值可比钻石，红宝石和蓝宝石以及祖母绿。
根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?
The weather are found in many different crystal packing preparations. The most common lattice constructions for metals are These obtained by stacking the atomic spheres into probably the most compact arrangement.
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crystal The recently crystallized quartz grains are characterized by elongate crystals oriented oblique here towards the shear band margins, defining a typical grain-form foliation. 来自 Cambridge English Corpus We are saying the chain topology during the significant w location acts as being the proverbial ' scratch-on-theglass ' wanted from the organic chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter amid the individual crystals may well reflect incorporation of xenocrysts from previously 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.
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”。
The sodium chloride crystal lattice is characterized because of the near packing with the favourable sodium ions and negative chloride ions. Each sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by 6 sodium ions, making a highly stable and symmetrical composition.
水精：水晶为何称为水精，《广雅》有巧解：�?水之精灵�?”；李时珍则说：�?莹洁晶光，如水之精英 ”。细加考究，此称还蕴含浓厚的宗教意味呢。水精一名，最初见于佛书，后汉支曜翻译的《具光明定意经》说：�?其所行道，色如水�?�?。
The C60 molecules, also referred to as buckyballs, are really sturdy and Virtually incompressible. Crystals are shaped such the balls are organized in an fcc lattice having a one-nanometre spacing in between the centres of adjacent balls. The related C70 molecule has The form of the rugby ball; C70 molecules also sort an fcc crystal when stacked together. The stable fullerenes kind molecular crystals, with weak binding—furnished by van der Waals interactions—involving the molecules.