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:
Another entertaining, and delicious, experiment will be to form large crystals making use of sugar. By heating sugar with h2o and afterwards permitting this Resolution evaporate on sticks, you may kind rock sweet from sugar crystals!
晶及其石英岩类玉石是中低档宝玉石,虽比不上钻石、红蓝宝石的高贵,但在加工中如果构思巧妙而且加工精细,同样具有很高的价值。如中国传统的玛瑙“虾盘”、“龙盘”、“水漫金山�?水胆玛瑙摆件)都被誉为国家级宝玉石。
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Fig. four: Developing blocks with diverse designs and floor chemistries immediate the formation of unique 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。
解理:无解理。所谓解理是指矿物被打击时,沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类:极完全解理、完全解理、中等解理、不完全解理和无解理,水晶属于无解理。
Ionic Crystals: Electrostatic forces form ionic bonds. A classic illustration is often a halite or salt crystal.
Among the binary crystals, the simplest structures to visualize are People with equivalent figures of The 2 varieties of atoms. The construction of sodium chloride is predicated over a dice. To assemble the lattice, the sodium and chlorine atoms are put on click here alternate corners of the dice, and the framework is repeated (Determine 3B).
22Working from what The united states already appreciates about by itself, the bureau's authorities together with other demographers offer an irresistible, if clouded, crystal ball between their visions.
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水晶形成后由于外力作用或某种人为原因使水晶产生大的裂隙或裂纹,这种裂纹有大有小,对水晶的影响也有大小之分。
⑦双色水晶:一种紫色和黄色共存一体的水晶,紫色、黄色之间界限较明显,分别占据晶块的一部分。
Binary crystals are found in lots of structures. Some pairs of components form multiple structure. At room temperature, cadmium sulfide could crystallize either while in the zinc blende or wurtzite composition. Alumina also has two attainable structures at home temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit unique buildings at distinct temperatures. Among the most advanced crystals are All those of silicon dioxide (SiO2), that has seven various constructions at a variety of temperatures and pressures; the commonest of those buildings is quartz.