The best Side of Crystal
The best Side of Crystal
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These crystals had been formed over 1,000,000 yrs in the past inside the Earth's crust. They take place when the liquid while in the Earth consolidates and the temperature chills. Other crystals variety when the liquid tends to make its way with the clefts and dispense minerals in the clefts.
水晶原石观赏石充分体现了天然水晶的本质，经过抛光的水晶原石观赏石，玲珑剔透、晶莹璀璨，独具匠心的设计，恰到好处地显露出水晶的魅力。如果您想单纯的欣赏水晶，水晶原石观赏石是你的不二之选，给人一种返璞归真的感觉。
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。
Tetragonal: These crystals type prisms and double pyramids. The framework is like a cubic crystal, apart from a single axis is extended than the opposite.
Fig. four: Making blocks with various designs and area chemistries direct the development 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。
Crystals appear distinctive from a number of other rocks and minerals, but �?barring a few Distinctive scenarios �?nearly all minerals conceal a crystalline structure underneath the area.
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13Nearly all computers have a quartz-crystal clock to control their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
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15The trick to a great thermoelectric product is actually a crystal construction by which electrons can move freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。
You can find only a few unique device-mobile shapes, so many alternative crystals share only one unit-cell style. A significant characteristic of the unit cell is the quantity of atoms it consists of. The whole quantity of atoms in your entire crystal is definitely the selection in Each individual mobile multiplied by the volume of device cells. Copper and aluminum (Al) Each individual have a single atom for every unit cell, while zinc (Zn) and sodium chloride have two. Most crystals have just a few atoms for each device mobile, but there are many exceptions. Crystals of polymers, by way of example, have 1000s of atoms in Just about every device cell.
水晶饰品越来越受到人们的喜爱。中国、日本、韩国、美国等国家的人们还对水晶球情有独钟，喜欢将它们摆在家里或办公室里，认为水晶球有灵性，能保平安，带来财运。不过天然水晶不像看起来那么晶莹剔透，它也有瑕疵，我们在选购饰品的时候要注意。此外，我们还要掌握水晶的评价依据、选购方法，这样可以帮助我们在琳琅满目的水晶饰品中选到心仪的水晶。
The C60 molecules, also known as buckyballs, are rather solid and almost incompressible. Crystals are formed these types of that the balls are arranged in an fcc lattice that has a a person-nanometre spacing involving the centres of adjacent balls. The comparable C70 molecule has The form get more info of the rugby ball; C70 molecules also sort an fcc crystal when stacked alongside one another. The stable fullerenes kind molecular crystals, with weak binding—provided by van der Waals interactions—amongst the molecules.