Not known Details About Crystal
Not known Details About Crystal
Blog Article
Not all crystals are equally crystalline. There will often be impurities, and the ionic & covalent between molecules can build vastly unique constructions away from the same product. A terrific example of this are diamonds and graphene.
Cite Although each and every effort has long been made to stick to citation type guidelines, there might be some discrepancies. Make sure you confer with the right fashion handbook or other resources if you have any thoughts. Decide on Citation Design and style
发晶的价值取决于发的颜色、罕见性及大小，一般是发色鲜艳、块度大的价格高。水胆水晶的价值主要取决于水胆及晶体的大小、透明度的高低。如果水胆较大并有一定形态，便可加工成较为珍贵的工艺品。另外水胆中的水也有一定的科学研究价值，通过它们可了解几百万年前地球上水的成分及变化。
诗中道出一段唐代由盛变衰的史实。玄宗末年，杨贵妃得宠，三姐妹并封为国夫人。他们养尊处优，奢华至极，仆人用水晶盘将珍馐佳肴端到宴席上，美人觉得没有口味，懒得动筷子。作为“诗圣”作为“史诗”，紫驼一段写饮食之精美，不空发议论，只尽情揭露事实，无一刺讥语，无一慨叹声，却使人于以外得之：此诗之善讽也。以史为鉴，这样的世道，这样的人物，国家不出“安史之乱”那样的大祸反倒不正常了。
2She was wearing a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
These examples are from corpora and from resources online. Any views inside the examples tend not to characterize the viewpoint in the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
水晶原石观赏石，从字面意义理解：观赏水晶石的原貌，即经过抛光去皮后的包裹体水晶和原色水晶，不需雕刻不求象形就具有非常高的观赏价值和收藏价值。此类水晶观赏石对质地要求非常之高，水晶晶体通透干净，颜色艳丽，意境鲜明深刻的价值就高，它的价值特点就好比钻石，实实在在石头本身的价值。
Hexagonal �?Characterized by 4 axes, three of that happen to be equivalent in length and intersect at one hundred twenty levels, by using a fourth axis perpendicular to one other three.
Many crystals behave like butter in that they're tough at small temperatures but soft at increased temperatures. They may be identified as solids in the slightest degree temperatures down below their melting issue. A doable definition of a reliable can be an object that retains its condition if still left undisturbed. The pertinent issue is how long more info the item retains its form. A really viscous fluid retains its condition for one hour although not a year. A strong ought to preserve its shape longer than that.
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。
⑥、丝印：水晶表面附有不同的色料进行效果处理，颜色层面较厚，着力后方可脱落。
Crystal Lattices There are seven programs of crystal constructions, which might be also known as lattices or Room lattices:
The structure of the sodium atoms by itself, or perhaps the chlorine atoms alone, is fcc and defines the device mobile. The sodium chloride structure As a result is manufactured up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) relies to the bcc structure; every other atom is cesium or chlorine. In this case, the unit cell is really a cube. The 3rd important structure for AB
This crystal structure is chargeable for the exceptional physical and chemical Attributes of sodium chloride, like its significant melting issue, electrical conductivity, and ability to type ionic bonds quickly.