5 Essential Elements For Crystal
5 Essential Elements For Crystal
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对这类水晶晶簇观赏石的欣赏与评价，主要是强调晶体的完整、品种的名贵（如紫水晶、烟晶、发晶等）、造型奇特、含有名贵晶体（如辰砂、辉锑矿等）伴生等。晶簇产于矿床晶洞中，长相完美的并不多见，要完整无损地采集下来，又比较困难，故而采集起来代价较大，精品晶簇价值也就昂贵了。
23Sometimes, on the other hand, the crystal form of the silicate inclusions is observed to resemble extra closely the internal framework 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。
Chemical Bonds The kinds of chemical bonds fashioned amongst atoms or groups of atoms in crystals count on their size and electronegativity. You can find four categories of crystals as grouped by their bonding:
诗中道出一段唐代由盛变衰的史实。玄宗末年，杨贵妃得宠，三姐妹并封为国夫人。他们养尊处优，奢华至极，仆人用水晶盘将珍馐佳肴端到宴席上，美人觉得没有口味，懒得动筷子。作为“诗圣”作为“史诗”，紫驼一段写饮食之精美，不空发议论，只尽情揭露事实，无一刺讥语，无一慨叹声，却使人于以外得之：此诗之善讽也。以史为鉴，这样的世道，这样的人物，国家不出“安史之乱”那样的大祸反倒不正常了。
There's also quite a few components that resemble crystals but are literally polycrystals. Polycrystals sort when microscopic crystals fuse with each other to variety a reliable. These elements do not consist of requested lattices.
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。
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26Some of the best drinking Eyeglasses are constructed from guide crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
Metallic Crystals: Metals usually sort metallic crystals, where a number of the valence electrons click here are free to maneuver throughout the lattice. Iron, as an example, can variety different metallic crystals.
Solids that have limited-array order but absence extensive-vary buy are termed amorphous. Virtually any substance is usually made amorphous by quick solidification with the soften (molten condition). This issue is unstable, plus the sound will crystallize in time. When the timescale for crystallization is a long time, then the amorphous state appears steady.
15The trick to an excellent thermoelectric substance can be a crystal composition by which electrons can stream 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 will discover only a few diverse device-cell designs, so a variety of crystals share only one unit-cell kind. A significant characteristic of the unit mobile is the quantity of atoms it incorporates. The full range of atoms in the complete crystal could be the quantity in Each and every cell multiplied by the number of unit cells. Copper and aluminum (Al) Just about every have one atom for every device mobile, though zinc (Zn) and sodium chloride have two. Most crystals have only some atoms for each unit cell, but there are numerous exceptions. Crystals of polymers, for example, have A large number of atoms in Every unit mobile.
玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。
水晶观赏石是天然水晶中最具代表的作品，具有其他宝石都不具备的观赏性。不论是玉石翡翠还是都要经过雕琢后次能体现他的价值，而水晶观赏石只需要将表面进行抛光，即展现出晶体内所包裹的物质，直接欣赏原汁原味的水晶石。