Detailed Notes on Crystal
Detailed Notes on 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：
A elementary strategy in crystal structures would be the device cell. It's the smallest unit of volume that allows equivalent cells to get arranged collectively to occupy all accessible House. The geometrical basis of all crystals could be the lattice. A lattice is often viewed as an everyday and infinite arrangement of points or atoms, the place Every single place or atom has A similar surrounding environment.
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
Fig. 3: A library of lattice symmetries is often accessed by modifying the particle core and DNA shell.
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
Lattices can have one particular lattice point for each cell or more than one, yielding a complete of fourteen Bravais crystal lattice forms. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the three-dimensional array produced by a set of discrete points.
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
The weather are observed in many different crystal packing preparations. The commonest lattice constructions for metals are People attained by stacking the atomic spheres into essentially the most compact arrangement.
第三种是“皮景”，因某些其他的矿物与水晶体共生，或由于其他的物质侵蚀而依附于水晶表面，或者是水晶受自然环境的影响，在水晶表面出现蚀象，形成了一些景象或图案，这种景观存在于水晶表面。
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. The second layer is shaded during the determine. It's exactly the same aircraft-triangular framework; the atoms sit in the holes formed by the main layer. The main layer has two equivalent sets of holes, nevertheless the atoms of the second layer can occupy just one set. The third layer, labeled C
The arrangement of an atom’s electrons establishes its website chemical Qualities. The properties of solids are often predictable from the Homes in their constituent atoms and molecules, and the various shell buildings of atoms are for that reason chargeable for the variety of solids.
Crystals are categorized usually groups, including insulators, metals, semiconductors, and molecular solids. Just one crystal of the insulator is often clear and resembles a piece of glass. Metals are shiny Unless of course they may have rusted. Semiconductors are sometimes shiny and often transparent but are never rusty. Lots of crystals could be labeled as just one type of solid, while some have intermediate conduct. Cadmium sulfide (CdS) might be geared up in pure form and is an excellent insulator; when impurities are extra to cadmium sulfide, it turns into an interesting semiconductor.
Sensible Vocabulary: relevant terms and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology gold dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See additional effects » You may as well uncover associated words, phrases, and synonyms inside the matters: