An Unbiased View of Crystal
An Unbiased View of Crystal
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水晶表面坑洼的地方，有的深，有的浅，这是水晶在成长过程中自然形成的，并非是人为造成的损伤。缺陷位置本来包有其他矿物晶体，由于包裹体和水晶结合部位的结合力不强，当表面抛光时，矿体脱落，留下空位。这种缺陷在绿幽灵、钛晶、金发晶上都比较常见。
One more pleasurable, and delicious, experiment is to variety significant crystals working with sugar. By heating sugar with h2o and afterwards permitting this solution evaporate on sticks, you could sort rock sweet from sugar crystals!
A simple notion in crystal structures may be the unit cell. It's the smallest unit of volume that allows equivalent cells to be stacked together to fill all House. By repeating the pattern of your unit mobile repeatedly in all Instructions, your complete crystal lattice can be created. A dice is the simplest example of a device mobile. Two other illustrations are revealed in Determine one. The primary is definitely the device cell for the confront-centred cubic lattice, and the second is for any human body-centred cubic lattice. These structures are discussed in the subsequent paragraphs.
Most good supplies found in nature exist in polycrystalline type instead of as only one crystal. They are actually composed of numerous grains (smaller crystals) packed collectively to fill all Place. Each individual person grain has a unique orientation than its neighbours. Although lengthy-assortment get exists in just one particular grain, in the boundary among grains, the purchasing adjustments way. A typical bit of iron or copper (Cu) is polycrystalline.
25If you are a Billy Crystal enthusiast, you may 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。
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
There's a comparable directive about crystal glass which differentiates concerning full lead crystal, lead crystal and crystal.
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⑤化学稳定�?非常好，在常温下仅溶解于氢氟酸，不溶解于其它各类酸、碱。在高温高压条件下可溶解于碳酸钠溶液中。
16I opened the box and noticed a bit of crystal snowflake in addition to a greeting card with "Joyful 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。
Crystal Lattices You will discover seven methods of crystal structures, which happen to be also called lattices or Place lattices:
14For instance, Now we have Quartz crystal clocks and watches precise to in just a single moment a year.例如，我们使用的每年误差不超过one分钟的石英水晶钟表和手表。
21You all understand how after you take a crystal prism and move a get more info beam of sunlight through it, you can get a spectrum, which appears like a continual band of rainbow colours.