Facts About Crystal Revealed

Not all crystals are equally crystalline. There are frequently impurities, plus the ionic & covalent in between molecules can generate vastly distinct buildings away from a similar material. An incredible example of this are diamonds and graphene.

①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。

These advances contain unique buildings with programmable lattice symmetries and effectively-described crystal patterns, responsive components that leverage the intrinsic Houses of nucleic acids to manipulate structures on demand, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals that supply insights into gentle–make a difference interactions. Searching forward, we problem the Neighborhood to leverage the amazing structural Handle afforded by crystal engineering with DNA to synthesize lessons of purposeful materials that thrust outside of what has long been attainable with Obviously transpiring crystalline products or those created by far more conventional approaches.

Include to term listing Incorporate to word record C2 [ U ] clear glass of really top quality, ordinarily with its floor Slash into fragile patterns

断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。

无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。

Crystals glance exceptional from all kinds of other rocks and minerals, but �?barring several Particular cases �?almost all minerals disguise a crystalline structure beneath the area.

市场上有很多人把熔炼水晶也叫做合成水晶，那是不准确的，一般都是以水晶废料为原料在高温高压下熔炼出来的，而不是结晶成的，不具备水晶的晶体特性，所以不能把熔炼水晶与合成水晶混为一谈；但是熔炼水晶耐高温，用优质二氧化硅熔炼成的熔炼水晶可以做成实用产品比如水晶杯、烤盘、茶具等，实际上一代伟人毛泽东主席的水晶棺就是选用东海优质水晶熔炼而成的。

本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。

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There are two these types of achievable periodic preparations. In Each individual, the very first layer has the atoms packed right into a aircraft-triangular lattice in which each atom has 6 speedy neighbours. Figure two reveals this arrangement for your atoms labeled A

Orthorhombic: These are typically rhombic prisms and dipyramids that resemble tetragons but devoid of square cross-sections.

Crystals are categorised generally speaking classes, like insulators, metals, semiconductors, and molecular solids. One crystal of an insulator is frequently clear and resembles a piece of glass. Metals are shiny Except if they've rusted. Semiconductors are sometimes shiny and often transparent but are hardly ever rusty. Several crystals could be categorized as an individual kind of solid, while some have intermediate behaviour. Cadmium sulfide (CdS) may be organized in pure type and is a superb insulator; when impurities are added to cadmium sulfide, it becomes an interesting semiconductor.

Wise Vocabulary: associated text 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 extra benefits » You can also come across linked words and phrases, phrases, and synonyms during the matters: