Not known Details About Crystal
Not known Details About Crystal
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Calcite crystals are frequently Employed in optical products, and even the graphite in pencil guide are sheets of crystals that essentially break apart layer by layer to write. Silica can variety silicate crystals which might be The idea for quartz, mica, olivine, and a number of other crystals and minerals.
杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。
4Without a crystal ball, It can be extremely hard to say exactly where we will be following 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 can enjoy 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》
当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。
30Three times went past, and I was amazed to view it yet again: the many openings had been sewed up by skinny and white thread and they appeared such as the ice crystal on Wintertime's branches inside the north.
Being a very hot solution cools or a saturated solution evaporates, particles attract shut plenty of for chemical bonds to sort. Crystals could also sort from deposition directly from the gasoline phase. Liquid crystals have particles oriented within an structured method, like sound crystals, nonetheless will be able to circulation.
Amongst the binary crystals, the easiest buildings to visualise are Those people with equal quantities of The 2 varieties of atoms. The structure of sodium chloride is predicated on a cube. To assemble the lattice, the sodium and chlorine atoms are put on alternate corners of a dice, as well as the construction is repeated (Figure 3B).
The definition of the reliable appears noticeable; a strong is generally considered staying challenging and organization. On inspection, nevertheless, the definition will become a lot less straightforward. A dice of butter, for example, is tough right after becoming saved in the fridge and it is get more info Evidently a strong. Just after remaining over the kitchen counter for each day, precisely the same dice results in being fairly gentle, and it can be unclear if the butter should still be deemed a stable.
被主体水晶所捕获的包裹体。原生包裹体通常为固相，形态较规则。水晶中典型的原成包裹体有金红石、电气石、黄铁矿等，也会见到岩石碎屑或集合体。
Orthorhombic: These are generally rhombic prisms and dipyramids that resemble tetragons but without having sq. cross-sections.
在透明的水晶中，隐裂纹呈亮晶晶的片状，有时还会有晕彩效应。这些裂纹是水晶在生长过程中，遇到外力挤压而在内部产生的一些隐形裂纹，隐裂纹在芙蓉石、紫水晶、白水晶球及白水晶柱中都很常见。有的裂纹后来被物质填充，形成愈合的裂纹，也就是原来的裂纹又长住了。这种裂纹对水晶的影响相对要小一些。
Tetragonal �?Characterised by 3 mutually perpendicular axes, two of which can be equivalent in size, though the 3rd is for a longer period or shorter and perpendicular to the opposite two.