The Greatest Guide To Crystal
The Greatest Guide To Crystal
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27Local economists have seemed into their crystal balls and witnessed a little something fairly unpleasant.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
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。
A crystal structure concentrates on how the atoms are organized Within the crystal. On the other hand, crystallographers have an interest in the general condition and size with the crystal and also its external characteristics. To perform this, they have to understand about the crystal process.
Tetragonal: These crystals type prisms and double pyramids. The composition is sort of a cubic crystal, other than 1 axis is for a longer period than the opposite.
How Crystals Kind The whole process of forming a crystal is called crystallization. Crystallization typically takes place any time a strong crystal grows from the liquid or Alternative.
Find out how the shape of website the crystals decide the various minerals into familiesMinerals crystallize In keeping with certainly one of 7 motifs, known as crystal devices.
Add to phrase record Increase to term checklist [ C/U ] transparent rock that looks like ice, or maybe a bit of it
②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。
22Working from what The usa already knows about itself, the bureau's specialists together with other demographers give an irresistible, if clouded, crystal ball amid their visions.
地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。
Orthorhombic: They're rhombic prisms and dipyramids that resemble tetragons but without having sq. cross-sections.
⑤、打孔：是在水晶成品未完成前，根据其所需打孔之尺寸及位置，以钻头加工，如制表件、笔筒、瓶孔等。
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