Top Guidelines Of Crystal
Top Guidelines Of Crystal
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水晶表面坑洼的地方，有的深，有的浅，这是水晶在成长过程中自然形成的，并非是人为造成的损伤。缺陷位置本来包有其他矿物晶体，由于包裹体和水晶结合部位的结合力不强，当表面抛光时，矿体脱落，留下空位。这种缺陷在绿幽灵、钛晶、金发晶上都比较常见。
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。
4Without a crystal ball, It is really unachievable to say wherever we'll be subsequent calendar 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》
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《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
Encyclopaedia Britannica's editors oversee subject matter regions during which they may have considerable expertise, regardless of whether from years of knowledge acquired by working on that material or by way of review for a complicated diploma. They produce new information and confirm and edit content material acquired from contributors.
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Hexagonal �?Characterised by four axes, three of which happen to be equal in size and intersect at 120 degrees, which has a fourth axis perpendicular to one other three.
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：
22Working from what The usa already understands about alone, the bureau's experts as well as other demographers offer an irresistible, if clouded, crystal ball among their visions.
In the Cambridge English Corpus We say the chain topology from the high w region functions given that the proverbial ' scratch-on-theglass ' desired inside the organic chemistry laboratory to help make crystals. Within the Cambridge English Corpus Constant-stress and temperature molecular-dynamics simulations of crystals in the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus Besides these, dust particles are already observed in small-temperature plasmas, like those Utilized in plasma processing check here and plasma crystals. With the Cambridge English Corpus The final Element of the e book focuses on peculiarities of strongly coupled dusty plasmas, like the formation of dust crystals and connected desirable forces. With the Cambridge English Corpus Complete characterization of injury 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 were not observed. Through the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from sources on the net. Any opinions from the illustrations tend not to represent the view from the Cambridge Dictionary editors or of Cambridge College Push 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（progress traces）。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」。
The structure of the sodium atoms by itself, or even the chlorine atoms by itself, is fcc and defines the device mobile. The sodium chloride framework Consequently is created up of two interpenetrating fcc lattices. The cesium chloride lattice (Determine 3A) relies around the bcc composition; each other atom is cesium or chlorine. In such a case, the device cell can be a dice. The third important structure for AB
对于紫水晶黄水晶这样的单色水晶，通常要观察它的二色性，即使是最顶级的紫水晶黄水晶也是有色差的，通过这个方法可以鉴别是否加色。