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。
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天然水晶是不可再生资源,随着开发的深入,天然水晶存量已越来越少,为了可持续发展,东海县政府早就制定了保护本地资源,鼓励开发海外水晶资源的政策,但是,海外资源也越来越少,很多国家都提高了开采和出口天然水晶的门槛,进入东海市场的外国水晶价格连年暴涨,其中观赏水晶比普通水晶涨价更快。
We have published about in excess of three hundred stones in the mineral kingdom! Read about Each individual stone's exceptional origin, record, and energies underneath.
25If you're a Billy Crystal admirer, you'll 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》
你们都知道,拿起一个水晶棱镜,让一束阳光通过它,就会得到一个光谱,看起来就像一条连续的彩虹色带。
⑩、雷射内雕:以计算机辅助激光设备在水晶对象中进行三维图案的成型,艺术效果好,可以任意表达各类图案,图形,达到逼真效果
11I thoroughly opened the package and located a crystal bell inside.我小心地打开包裹,发现里面有一个水晶钟。
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�?。
crystal The recently crystallized quartz grains are characterized by elongate crystals oriented oblique for the shear band margins, defining an average grain-form foliation. 来自 Cambridge English Corpus We say the chain topology in the higher w area acts because the proverbial ' scratch-on-theglass ' required within the natural and organic chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter among the individual crystals could mirror incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene varieties neutral to pale brown, subhedral to anhedral crystals, at times that contains inclusions of plagioclase microlaths and opaque phases.
16I opened the box and saw a piece of crystal snowflake along with a greeting card with more info "Content Birthday" from the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
Fig. one: Schematic of crystal formation from developing blocks made up of a particle Main in addition to a shell of DNA ligands connected for the particle area.
14For case in point, We've got Quartz crystal clocks and watches accurate to in just 1 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 known as buckyballs, are fairly sturdy and almost incompressible. Crystals are shaped these types of that the balls are organized within an fcc lattice using a just one-nanometre spacing in between the centres of adjacent balls. The very similar C70 molecule has the shape of a rugby ball; C70 molecules also kind an fcc crystal when stacked alongside one another. The strong fullerenes sort molecular crystals, with weak binding—supplied by van der Waals interactions—involving the molecules.