Not known Details About Crystal
Not known Details About Crystal
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This idea applies equally in a single, two, and three-dimensional Areas. The whole crystal lattice could be built by consistently reproducing the sample in the device mobile in all directions.
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
发晶的价值取决于发的颜色、罕见性及大小，一般是发色鲜艳、块度大的价格高。水胆水晶的价值主要取决于水胆及晶体的大小、透明度的高低。如果水胆较大并有一定形态，便可加工成较为珍贵的工艺品。另外水胆中的水也有一定的科学研究价值，通过它们可了解几百万年前地球上水的成分及变化。
Big crystals of diamond are beneficial gemstones. The crystal has other appealing properties; it's the highest seem velocity of any reliable and is the greatest conductor of warmth. Other than diamond, one other frequent type of carbon is graphite, which happens to be a layered substance. Every single carbon atom has 3 coplanar close to neighbours, forming an arrangement known as the honeycomb lattice. 3-dimensional graphite crystals are received by stacking identical layers.
In addition there are a lot of components that resemble crystals but are actually polycrystals. Polycrystals sort when microscopic crystals fuse jointly to variety a sound. These products usually do not consist of ordered lattices.
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
石英：《广雅》称水晶叫石英，色白如莹者又叫白。为附的异形字。司马相如《子虚赋》就�?�?雌黄�?�?之句。苏林解释：�?�?，白石英�?”。
The elements are uncovered in many different crystal packing preparations. The commonest lattice buildings for metals are those received by stacking the atomic spheres into quite possibly the most compact arrangement.
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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。
The arrangement of the atom’s electrons determines its chemical Attributes. The Attributes of solids are frequently predictable in the properties of their constituent atoms and molecules, and different shell constructions of atoms are therefore liable for the diversity of solids.
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。
Binary crystals click here are found in a lot of buildings. Some pairs of things variety more than one structure. At home temperature, cadmium sulfide may possibly crystallize possibly from the zinc blende or wurtzite composition. Alumina also has two possible constructions at home temperature, α-alumina (corundum) and β-alumina. Other binary crystals show distinctive buildings at unique temperatures. Among the most sophisticated crystals are Individuals of silicon dioxide (SiO2), which has seven different buildings at different temperatures and pressures; the commonest of those structures is quartz.