Not known Facts About Crystal
轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。23Sometimes, nonetheless, the crystal type of the silicate inclusions is observed to resemble a lot more closely the internal structure of diamond than that of other silicate minerals.然而，有时观察到硅酸盐包裹体的晶体形态比其他硅酸盐矿物更接近金刚石的内部结构。
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。
Big crystals of diamond are valuable gemstones. The crystal has other intriguing Qualities; it has the highest sound velocity of any solid and is the greatest conductor of heat. In addition to diamond, the opposite widespread form of carbon is graphite, and that is a layered material. Each and every carbon atom has 3 coplanar around neighbours, forming an arrangement called the honeycomb lattice. 3-dimensional graphite crystals are obtained by stacking very similar layers.
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
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时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：
The weather are located in a variety of crystal packing preparations. The most typical lattice constructions for metals are Individuals obtained by stacking the atomic spheres into by far the most compact arrangement.
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⑤化学稳定�?非常好，在常温下仅溶解于氢氟酸，不溶解于其它各类酸、碱。在高温高压条件下可溶解于碳酸钠溶液中。
. The 2nd layer is shaded get more info in the figure. It's got the identical aircraft-triangular composition; the atoms sit during the holes formed by the very first layer. The primary layer has two equal sets of holes, although the atoms of the next layer can occupy only one established. The 3rd layer, labeled C
Orthorhombic: They're rhombic prisms and dipyramids that resemble tetragons but without the need of sq. cross-sections.
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。
The C60 molecules, also known as buckyballs, are really potent and Practically incompressible. Crystals are fashioned these that the balls are organized in an fcc lattice which has a just one-nanometre spacing in between the centres of adjacent balls. The comparable C70 molecule has the shape of a rugby ball; C70 molecules also sort an fcc crystal when stacked together. The strong fullerenes kind molecular crystals, with weak binding—furnished by van der Waals interactions—involving the molecules.