Top Guidelines Of Crystal
Top Guidelines Of Crystal
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轴性、光性:一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的,其黑十字臂未达中心,形成中空的图案,俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
按照透明度指标,水晶越透明,价格越高,好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽,否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明,可有较多裂纹。三者价值依次降低,熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中,晶体较大的,可用来做水晶眼镜和雕刻高档工艺品,因而价格较高。
4Without a crystal ball, It is really impossible to state the place we'll be next 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》
看原料:选料精良的水晶制品,应看不到胶口及棉絮;质地纯净、光润、晶莹为好。
25If you're a Billy Crystal enthusiast, you will 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》
Learn the way The form in the crystals figure out the several minerals into familiesMinerals crystallize As outlined by among 7 motifs, generally known as crystal techniques.
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26Some of the best ingesting glasses are constructed from direct crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
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�?。
[ C/U ] transparent glass of high quality, typically with its surface Slice into styles that replicate light-weight
⑥、丝印:水晶表面附有不同的色料进行效果处理,颜色层面较厚,着力后方可脱落。
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 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」。
14For case in point, We've got Quartz crystal clocks and watches precise to inside just one moment a year.例如,我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
The C60 molecules, also referred to as buckyballs, are quite potent and Just about incompressible. Crystals are shaped this sort of which the balls are organized within an fcc lattice which has a a single-nanometre spacing amongst the centres of adjacent balls. The related C70 molecule has the shape of a rugby more info ball; C70 molecules also kind an fcc crystal when stacked together. The strong fullerenes type molecular crystals, with weak binding—supplied by van der Waals interactions—concerning the molecules.