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:
A fundamental thought in crystal buildings will be the unit cell. It is the smallest device of volume that allows identical cells for being organized collectively to occupy all available House. The geometrical basis of all crystals will be the lattice. A lattice could be viewed as an everyday and infinite arrangement of factors or atoms, in which Each and every point or atom has An analogous surrounding atmosphere.
水晶文化历史悠久,古人曾赋予它一串极富美感的雅称:水玉、水精、水碧、石英等。
Fig. three: A library of lattice symmetries might be accessed by changing the particle Main and DNA shell.
C2 [ U ] clear glass of pretty superior quality, normally with its surface Minimize into fragile designs:
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。
Crystals look one of a kind from a number of other rocks and minerals, but �?barring a few Particular cases �?nearly all minerals conceal a crystalline framework underneath the area.
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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。
颜色:无色,浅至深的紫色,浅黄、中至深黄色,浅至深褐、棕色,绿至黄绿色,浅至中粉红。
There's two these possible periodic preparations. In Every, the first layer has the atoms more info packed into a aircraft-triangular lattice in which every atom has six immediate neighbours. Figure 2 displays this arrangement for that atoms labeled A
Crystallography could be the study of crystals, and it bargains with almost everything from excellent geometric styles to seemingly random conglomerations of particles and minerals.
14For example, We've got Quartz crystal clocks and watches exact to within just a person moment a 12 months.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。
Tetragonal �?Characterized by a few mutually perpendicular axes, two of which might be equal in duration, while the 3rd is for a longer time or shorter and perpendicular to one other two.