Not known Details About Crystal
Not known Details About 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：
Bismuth (Bi) appears to become a metallic, but the quantity of electrons readily available for electrical conduction is similar to that of semiconductors. In reality, bismuth is called a semimetal. Molecular solids are often crystals fashioned from molecules or polymers. They can be insulating, semiconducting, or metallic, according to the type of molecules while in the crystal. New molecules are constantly being synthesized, and many are made into crystals. The volume of diverse crystals is gigantic.
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。
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。
There are also several products that resemble crystals but are actually polycrystals. Polycrystals kind when microscopic crystals fuse with each other to kind a stable. These components never consist of requested lattices.
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�?。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
Crystals are very little over an purchased arrangement of molecules or atoms. Crystals can be found in a number of sizes and styles, and each has unique traits. here Whatever they are created of determines how it can variety.
Metallic Crystals: Metals typically kind metallic crystals, in which a lot of the valence electrons are absolutely free to move throughout the lattice. Iron, by way of example, can type various metallic crystals.
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。
地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。
Crystals are not simply renowned for their physical physical appearance, but different crystals of various elements and formations may result in an unlimited variety of takes advantage of and Actual physical Attributes.
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。
An additional method of crystalline carbon is based on the molecule with sixty carbon atoms called buckminsterfullerene (C60). The molecular shape is spherical. Every single carbon is bonded to three neighbours, as in graphite, along with the spherical condition is accomplished by a combination of twelve rings with 5 sides and 20 rings with 6 sides. Identical structures were initially visualized by the American architect R. Buckminster Fuller for geodesic domes.