Not known Factual Statements About Crystal
Not known Factual Statements About Crystal
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27Local economists have looked into their crystal balls and found a thing instead unpleasant.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》
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
A standard principle in crystal buildings would be the device mobile. It is the smallest device of volume that permits similar cells for being stacked together to fill all Place. By repeating the pattern of the unit cell over and over in all Instructions, your entire crystal lattice is usually built. A dice is The best illustration of a unit mobile. Two other illustrations are shown in Figure one. The initial is definitely the device mobile for any deal with-centred cubic lattice, and the second is for a entire body-centred cubic lattice. These buildings are described in the subsequent paragraphs.
If you would like see how crystals are formed, you can do a little challenge as part of your very individual kitchen area and see the development of the crystals occur with your individual eyes . This can be completed by Placing a small volume of table salt into some standard faucet water, wait around click here 24 hrs, and you'll see nice cubed formations. This transpires because the h2o is evaporating, which brings about the atoms that make up the salt (the mineral) along with the h2o to come back closer jointly.
Crystalline composition is characterized by a geometrical, repeating pattern of symmetric molecular structure. The arrangement of atoms types these purchased, repeating designs.
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。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
11I very carefully opened the bundle and found a crystal bell inside.我小心地打开包裹，发现里面有一个水晶钟。
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crystal The newly crystallized quartz grains are characterized by elongate crystals oriented oblique into the shear band margins, defining a typical grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology in the significant w region functions as being the proverbial ' scratch-on-theglass ' essential during the natural chemistry laboratory to create crystals. 来自 Cambridge English Corpus The age scatter between the person crystals may mirror incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene varieties neutral to pale brown, subhedral to anhedral crystals, sometimes made up of inclusions of plagioclase microlaths and opaque phases.
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。
Crystallography could be the analyze of crystals, and it specials with anything from ideal geometric designs to seemingly random conglomerations of particles and minerals.
⑤、打孔：是在水晶成品未完成前，根据其所需打孔之尺寸及位置，以钻头加工，如制表件、笔筒、瓶孔等。
Fig. 5: The opportunity to comprehend defined crystal practices is depending on the symmetry engineering technique.