Crystal Fundamentals Explained
Crystal Fundamentals Explained
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Calcite crystals tend to be Utilized in optical machines, and in some cases the graphite in pencil direct are sheets of crystals that effectively break apart layer by layer to write. Silica can kind silicate crystals which are the basis for quartz, mica, olivine, and many other crystals and minerals.
Bismuth (Bi) seems to become a metallic, but the quantity of electrons readily available for electrical conduction is analogous to that of semiconductors. In fact, bismuth is called a semimetal. Molecular solids tend to be crystals formed from molecules or polymers. They are often insulating, semiconducting, or metallic, based on the form of molecules inside the crystal. New molecules are consistently becoming synthesized, and lots of are made into crystals. The volume of various crystals is gigantic.
These advancements consist of exotic structures with programmable lattice symmetries and very well-described crystal behavior, responsive products that leverage the intrinsic Qualities of nucleic acids to govern structures on need, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals that offer insights into mild–make a difference interactions. Searching forward, we problem the Neighborhood to leverage the incredible structural Manage afforded by crystal engineering with DNA to synthesize courses of useful elements that force further than what continues to be achievable with By natural means transpiring crystalline supplies or These created by additional typical techniques.
第一种是“全包裹体”，在水晶结晶的时候把这些物质包裹在晶体里面，这类包裹体所形成的各种景象，大多保持了水晶结晶时的原状，也就是说保存了几亿年的原状，极少受到自然环境的影响。
25If you're a Billy Crystal fan, you will really like this film.如果你是比利·克里斯特尔的影迷，你就会喜欢这部电影。《柯林斯英汉双解大词典》
Wise Vocabulary: associated words and phrases and phrases Glass blower blowpipe bulletproof glass Lower glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See additional outcomes » You may also discover connected terms, phrases, and synonyms from the topics:
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：
如果水晶内部杂质中有传说中人物的造型，如佛、星座、生肖等价值可能要高于同等颜色和净度的水晶。
水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：
英语-中文（简体） term #beta Beta /beta #preferredDictionaries ^selected title /chosen /preferredDictionaries
看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。
The sodium chloride crystal lattice is characterized with the near packing on the favourable sodium ions and destructive chloride ions. Each sodium ion is surrounded by 6 chloride ions, and every chloride ion is surrounded by six sodium ions, creating a really stable and symmetrical construction.
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。
The C60 molecules, also known as buckyballs, are pretty robust and Nearly incompressible. Crystals are fashioned these which the balls are organized within an fcc lattice using a 1-nanometre spacing in between the centres of adjacent balls. more info The very similar C70 molecule has the shape of a rugby ball; C70 molecules also variety an fcc crystal when stacked with each other. The reliable fullerenes sort molecular crystals, with weak binding—supplied by van der Waals interactions—amongst the molecules.