27Local economists have seemed into their crystal balls and noticed one thing somewhat nasty.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
A essential idea in crystal buildings may be the device cell. It is the smallest device of volume that enables identical cells for being arranged with each other to occupy all obtainable space. The geometrical foundation of all crystals would be the lattice. A lattice can be considered as an everyday and infinite arrangement of factors or atoms, the place Every issue or atom has A similar bordering setting.
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. 7: A template-directed approach can Manage The location of constructing blocks with a surface area in the development of complex structures.
看抛光：抛光的好坏直接影响到水晶制品的身价。抛光分为软抛光与硬抛光。
SMART Vocabulary: linked words and phrases Glass blower blowpipe bulletproof glass Slash glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See far more final results » You may as well discover similar terms, phrases, and synonyms during the subject areas:
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
Like a sizzling Answer cools or maybe a saturated Alternative evaporates, particles draw shut more than enough for chemical bonds to type. Crystals can also variety from deposition straight from the gas Crystal period. Liquid crystals possess particles oriented in an organized fashion, like strong crystals, however are able to flow.
Q.4. What's the difference between atomic composition and crystal construction? Ans. The first distinction between atomic construction and crystal construction lies inside their definitions: atomic structure refers to how atoms are arranged inside a single molecule or a cluster of molecules, Whilst crystal structure considerations the precise arrangement of atoms in just a solid material.
22Working from what The usa by now is familiar with about by itself, the bureau's specialists as well as other demographers offer an irresistible, if clouded, crystal ball among the their visions.
There's two these possible periodic arrangements. In Just about every, the very first layer has the atoms packed into a aircraft-triangular lattice in which each and every atom has six fast neighbours. Figure 2 reveals this arrangement for your atoms labeled A
Crystal Lattices You will find 7 systems of crystal structures, that are also called lattices or House lattices:
⑦双色水晶：一种紫色和黄色共存一体的水晶，紫色、黄色之间界限较明显，分别占据晶块的一部分。
水晶的价值根据品质、块体的大小、美感和产量多少的不同相差较大。遇到好的天然水晶要敢于下手，但好的水晶一般大家都想得到，值与不值，就要看经验了。由于天然水晶的开采和制作原因，没有瑕疵的水晶很难得到，纯净的饰品要达到与合成水晶媲美的品质，实在是很难得。另外，由于水晶的特性，在佩戴过程中，也会改变其等级，比如因为某种原因，有可能会逐渐产生较大裂纹。