Detailed Notes on Crystal

诗中“胜美玉”,“过冰清”,写出水晶的质地美,而“亦欲应时明”则描绘出水晶充满灵性的动态美,耐人寻味。罗维是有独特眼光,懂得水晶真谛,第一个称赞水晶超过美玉的伟大诗人。他的认识已被千年之后的科学理论所证实;以水晶为直接吟咏对象的诗篇还有:

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。

人造水晶分为熔炼水晶与养殖晶:据水晶专家汪毅的阐述,随着水晶的价值提高,喜欢的人增多,水晶也引起了作伪者的兴趣,现阶段中国水晶市场常见的造假方法为:

Most strong resources found in mother nature exist in polycrystalline sort rather than as one crystal. They are literally composed of countless grains (tiny crystals) packed alongside one another to fill all Place. Every person grain has a distinct orientation than its neighbours. Even though very long-selection order exists within a person grain, with the boundary concerning grains, the ordering adjustments direction. An average bit of iron or copper (Cu) is polycrystalline.

. These 4 structures comprise almost all of the binary crystals with equal figures of cations and anions.

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Add to term checklist Include to word checklist [ C/U ] transparent rock that looks like ice, or perhaps a bit of it

Crystals is often grown below average conditions from all ninety two In a natural way occurring aspects except helium, and helium can be crystallized at reduced temperatures by utilizing twenty five atmospheres of stress.

13Nearly all pcs consist of a quartz-crystal clock to manage their Procedure.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。

Solids that have short-variety purchase but lack extensive-array buy are identified as amorphous. Almost any material could be manufactured amorphous by rapid solidification from the melt (molten condition). This ailment is unstable, as well as the solid will crystallize in time. In the event the timescale for crystallization is many years, then the amorphous state appears steady.

16I opened the box and saw a piece of crystal snowflake in addition to a greeting card with "Pleased Birthday" during 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。

隐晶类水晶外观是一块块的,不是成六角水晶簇状,但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶,因为结晶的体积极为细小,需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑,因为结晶之间有“水化硅石”填补,玛瑙便属于此类。

⑨、喷砂:立体感弱,较平整,无凹凸感,机器雕刻文字、图形等后进行效果处理。成本低制作快。

Binary crystals are located in lots of structures. Some pairs of things variety multiple framework. At space temperature, cadmium sulfide may possibly crystallize possibly inside the zinc blende or wurtzite composition. Alumina also has two feasible constructions at place temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit unique buildings at distinctive temperatures. Among the many most sophisticated crystals are All those of silicon dioxide (SiO2), which has 7 here distinct constructions at different temperatures and pressures; the most typical of those constructions is quartz.

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