An Unbiased View of Crystal
An Unbiased View of Crystal
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Calcite crystals are sometimes Employed in optical machines, and also the graphite in pencil direct are sheets of crystals that fundamentally crack apart layer by layer to write. Silica can variety silicate crystals that are the basis for quartz, mica, olivine, and all kinds of other crystals and minerals.
Bismuth (Bi) appears being a metallic, but the volume of electrons available for electrical conduction is analogous to that of semiconductors. The truth is, bismuth is termed a semimetal. Molecular solids tend to be crystals shaped from molecules or polymers. They are often insulating, semiconducting, or metallic, depending on the style of molecules inside the crystal. New molecules are continuously currently being synthesized, and plenty of are created into crystals. The volume of diverse crystals is big.
4Without a crystal ball, It truly is impossible to convey where we'll be up coming year.不用水晶球预卜未来，我们说不准明年处境如何呀。《牛津词典》
③次生包裹体：指主体水晶形成后，由于环境的变化使得主晶周围的一些物质沿裂隙进入到其内部而形成的包裹体。形成的原因有出熔作用、裂隙的结晶化、以及放射性元素破坏的作用等。水晶典型的次生包裹体有胶花水晶中的氧化铁充填物等。
2She was sporting a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
Lattices may have a person lattice level per mobile or more than one, yielding a total of 14 Bravais crystal lattice kinds. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the a few-dimensional array made by a list of discrete details.
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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�?。
Solids which have small-range order but lack prolonged-assortment purchase are called amorphous. Nearly any substance is usually built amorphous by swift solidification within the melt (molten point out). This affliction is unstable, and also the solid will crystallize in time. In case the timescale for crystallization is several years, then the amorphous state appears secure.
From the Cambridge English Corpus We say the chain topology in the high w region acts because the proverbial ' scratch-on-theglass ' required inside the natural and organic chemistry laboratory to help make crystals. Through the Cambridge English Corpus Regular-pressure and temperature molecular-dynamics simulations of crystals of the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. Within the Cambridge English Corpus In combination with these, dust particles are already observed in minimal-temperature plasmas, like Those people used in plasma processing and plasma crystals. Within the Cambridge English Corpus The final Element of the guide concentrates on peculiarities of strongly coupled dusty plasmas, like the development of dust crystals and related interesting forces. Within the Cambridge English Corpus Full characterization of harm threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Within the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, Key morphologies weren't noticed. Through the Cambridge English Corpus See all examples of crystal These examples are from corpora and from resources online. Any thoughts from the illustrations don't depict the impression with the Cambridge Dictionary editors or of Cambridge College Press or its licensors.
正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（growth lines）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。
Crystals are categorised on the whole types, such as insulators, metals, semiconductors, and molecular solids. An individual crystal of an insulator is often clear and resembles a piece of glass. Metals are shiny unless they have rusted. Semiconductors are occasionally shiny and from time to time clear but are hardly ever rusty. Quite a few crystals is usually labeled as just one style of solid, while some have intermediate conduct. Cadmium sulfide (CdS) might be geared up in pure kind and is click here an excellent insulator; when impurities are added to cadmium sulfide, it gets to be a fascinating semiconductor.
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