看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
Bismuth (Bi) appears to get a metallic, but the volume of electrons readily available for electrical conduction is similar to that of semiconductors. Actually, bismuth is called a semimetal. Molecular solids tend to be crystals shaped from molecules or polymers. They may be insulating, semiconducting, or metallic, dependant upon the form of molecules while in the crystal. New molecules are continually getting synthesized, and several are made into crystals. The quantity of distinct crystals is big.
A fundamental strategy in crystal constructions is definitely the unit cell. It's the smallest unit of quantity that permits similar cells being stacked with each other to fill all House. By repeating the sample of your device mobile time and again in all Instructions, your complete crystal lattice might be built. A dice is the simplest example of a device cell. Two other illustrations are revealed in Figure one. The first will be the unit mobile for just a experience-centred cubic lattice, and the second is for the human body-centred cubic lattice. These constructions are spelled out in the subsequent paragraphs.
Massive crystals of diamond are beneficial gemstones. The crystal has other attention-grabbing Qualities; it's got the very best sound velocity of any reliable and is the best conductor of warmth. Other than diamond, another frequent type of carbon is graphite, and that is a layered product. Each and every carbon atom has 3 coplanar in the vicinity of neighbours, forming an arrangement known as the honeycomb lattice. 3-dimensional graphite crystals are received by stacking identical layers.
2She was wearing a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
结晶�?When sea water is allowed to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
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Like a sizzling Remedy cools or perhaps a saturated Resolution evaporates, particles attract near sufficient for chemical bonds to sort. Crystals could also type from deposition straight from the gas section. Liquid crystals possess particles oriented in an structured manner, like reliable crystals, yet will be able to circulation.
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crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique for the shear band margins, defining a normal grain-form foliation. 来自 Cambridge English Corpus We say the chain topology from the significant w region functions since the proverbial ' scratch-on-theglass ' required during the natural and organic chemistry laboratory to make crystals. 来自 Cambridge English Corpus The age scatter among the person crystals may well reflect incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene kinds neutral to pale brown, subhedral here to anhedral crystals, at times made up of inclusions of plagioclase microlaths and opaque phases.
say cheese something which somebody that is having a photograph of you tells you to say so that your mouth can make the shape of a smile
水晶形成后由于外力作用或某种人为原因使水晶产生大的裂隙或裂纹，这种裂纹有大有小，对水晶的影响也有大小之分。
《古今小说·李公子救蛇获称心》：“器皿皆是玻璃、水晶、琥珀、玛瑙为之，曲尽巧妙，非人间所有。”
This crystal composition is answerable for the exclusive physical and chemical Qualities of sodium chloride, such as its large melting point, electrical conductivity, and skill to variety ionic bonds conveniently.