17These rings are indicative of the crystal construction of nickel and will be described only by invoking wavelike properties of light.这些光圈表明了了镍的晶体结构，而且只能通过光线中波的特征来解释。
A basic strategy in crystal structures is the device mobile. It is the smallest device of quantity which allows similar cells for being arranged with each other to occupy all available space. The geometrical basis of all crystals is the lattice. A lattice could be considered as an everyday and infinite arrangement of factors or atoms, where Each individual level or atom has An analogous encompassing setting.
A standard strategy in crystal constructions is the device mobile. It's the smallest device of volume that allows equivalent cells to get stacked jointly to fill all Area. By repeating the pattern of your unit cell over and over in all Instructions, the complete crystal lattice is usually made. A dice is The best illustration of a device mobile. Two other examples are proven in Determine 1. The initial will be the device mobile for a face-centred cubic lattice, and the 2nd is for just a system-centred cubic lattice. These buildings are spelled out in the next paragraphs.
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。
25If you are a Billy Crystal fan, you will adore 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》
Monoclinic �?Characterised by 3 unequal axes, two of which intersect at an oblique angle, whilst the third is perpendicular to the airplane of the other two.
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
Crystals could be developed under average problems from all ninety two naturally taking place aspects besides helium, and helium is often crystallized at reduced temperatures by making use of 25 atmospheres of pressure.
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One crystals of metals are delicate and malleable, while polycrystalline metals are harder and much better and are more valuable industrially. Most polycrystalline elements can be produced into large solitary crystals immediately after prolonged warmth procedure. In the past blacksmiths would warmth a bit of metal to really make it malleable: heat helps make several grains grow large by incorporating lesser kinds. The smiths would bend the softened steel into condition after which you can pound it awhile; the pounding would make it polycrystalline all over again, growing its toughness.
Crystallography could be the examine of crystals, and it promotions with everything from excellent geometric designs to seemingly random conglomerations of particles and minerals.
The framework from the sodium atoms by yourself, or the chlorine atoms by yourself, is fcc and defines the unit cell. The sodium chloride framework Therefore is created up of two interpenetrating fcc lattices. The cesium chloride lattice (Determine 3A) is based on the bcc construction; just about every other atom is cesium or chlorine. In such cases, the unit mobile is really a dice. The third crucial framework for AB
Another type of crystalline carbon relies over a molecule with 60 carbon atoms termed buckminsterfullerene (C60). The molecular shape is spherical. Each carbon is bonded to three neighbours, as in graphite, along with the spherical shape is realized by a combination of twelve rings with five sides and 20 rings with 6 sides. Identical buildings were here being 1st visualized by the American architect R. Buckminster Fuller for geodesic domes.