The Definitive Guide to Crystal
The Definitive Guide to Crystal
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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：
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
看做工：水晶制品加工过程分为两种，即磨工和雕工。如水晶项链、手链、耳环等属于研磨品；观音像、内画鼻烟壶等属于雕刻品。
③次生包裹体：指主体水晶形成后，由于环境的变化使得主晶周围的一些物质沿裂隙进入到其内部而形成的包裹体。形成的原因有出熔作用、裂隙的结晶化、以及放射性元素破坏的作用等。水晶典型的次生包裹体有胶花水晶中的氧化铁充填物等。
Fig. four: Developing blocks with various shapes and surface area chemistries immediate the formation of distinct crystal symmetries.
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�?
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本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。
幽灵水晶，分绿幽灵，红幽灵，白幽灵等，主要组成为绿泥石，其中绿幽灵属于珍贵品种。
From your Cambridge English Corpus We are saying the chain topology within the large w region functions given that the proverbial ' scratch-on-theglass ' needed from the organic chemistry laboratory to help make crystals. With the Cambridge English Corpus Constant-tension and temperature molecular-dynamics simulations of crystals of your lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. With the Cambridge English Corpus In addition to these, dust particles are already observed in low-temperature plasmas, like Those people Utilized in plasma processing and plasma crystals. In the Cambridge English Corpus The final A part of the ebook focuses on peculiarities of strongly coupled dusty plasmas, including the formation of dust crystals and related desirable forces. From the Cambridge English Corpus Full characterization of injury threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Through the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or maybe more irregular, Major morphologies were not observed. Within the Cambridge English Corpus See all samples of crystal These examples are from corpora and from sources on the web. Any views while in the illustrations never stand for the opinion with the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
There are actually just a few unique device-cell designs, so many alternative crystals share an individual device-mobile kind. A crucial attribute of a unit mobile is the number of atoms it incorporates. The entire variety of atoms in your complete crystal would be the variety in Every single mobile multiplied by the quantity of device cells. Copper and aluminum (Al) Every single have one particular atom per unit mobile, though zinc (Zn) and sodium chloride have two. Most crystals have just a few atoms per device mobile, but there are some exceptions. Crystals of polymers, for example, have Countless atoms in Each and every device mobile.
玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。
Binary crystals are present in many buildings. Some pairs of features type multiple framework. At place temperature, cadmium sulfide may well crystallize either within the zinc blende or wurtzite structure. Alumina also has read more two feasible buildings at place temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit various structures at unique temperatures. Among the many most complicated crystals are People of silicon dioxide (SiO2), that has seven various constructions at many temperatures and pressures; the commonest of such structures is quartz.