The 5-Second Trick For Crystal
The 5-Second Trick For Crystal
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A strong is crystalline if it's got prolonged-assortment order. As soon as the positions of an atom and its neighbours are regarded at a person position, the spot of each atom is thought precisely through the entire crystal. Most liquids absence very long-array order, Whilst quite a few have quick-vary buy. Short range is outlined as the main- or next-closest neighbours of an atom. In many liquids the main-neighbour atoms are arranged in the same composition as from the corresponding good period.
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
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。
Insert to term listing Add to phrase list C2 [ U ] clear glass of very premium quality, usually with its area Slice into sensitive styles
根据美国已经了解的情况，统计局的专家和其他人口统计学家在他们的视野中提供了一个不可抗拒的水晶球。
当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。
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 elements are located in a number of crystal packing arrangements. The commonest lattice buildings for metals are All those obtained by stacking the atomic spheres into essentially the most compact arrangement.
仿制钛晶树水晶：钛晶是水晶里价格最昂贵的，造假者当然也不会放过这么好的产品。天然的环境下，在水晶里能生长个像树一样的钛晶，完全是可能的，只是这样的货很少，那我们的造假专家是如何做的呢，白水晶底下打个洞，激光打点成板状的钛晶进去，就这样这块水晶的身价就能飙升几十倍。往往有的钛晶戒面，会采用将钛晶部位割成板状，与圆面的水晶粘合的方法来制作。
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。
One crystals of metals are tender and malleable, though polycrystalline metals are tougher and more powerful and are more beneficial industrially. Most polycrystalline materials can be designed into big single crystals immediately after extended warmth therapy. Up to now blacksmiths would warmth a piece of steel to make it malleable: warmth will make a few grains grow huge by incorporating more compact ones. The smiths would bend the softened metallic into condition then pound it awhile; click here the pounding would allow it to be polycrystalline yet again, growing its energy.
You will find other minerals and molecules which will sort these crystal lattices. Snowflakes undoubtedly are a traditional illustration of a around symmetric and geometrically patterned composition from ice crystals, and gemstones of all kinds are usually crystals.
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。
21You all know the way whenever you take a crystal prism and go a beam of sunlight as a result of it, you obtain a spectrum, which looks like a continuous band of rainbow colours.