TOP LATEST FIVE CRYSTAL URBAN NEWS

Top latest Five Crystal Urban news

Top latest Five Crystal Urban news

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李商隐,杜牧,白居易,欧阳修,苏轼,呈大昌,辛弃疾,杨万里,吴文英,杨基,魏源等诗坛,词林大家都有歌吟水晶的佳篇传世。

⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体,这些包裹体的存在,影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质,与水晶整体不协调,被视为水晶的杂质,有这种杂质的水晶是次品。

A basic strategy in crystal constructions is definitely the device mobile. It is the smallest unit of quantity that permits identical cells for being stacked alongside one another to fill all space. By repeating the pattern of the device mobile again and again in all directions, all the crystal lattice may be built. A cube is The best illustration of a unit cell. Two other examples are proven in Determine 1. The very first will be the device mobile for any encounter-centred cubic lattice, and the second is for your entire body-centred cubic lattice. These buildings are defined in the next paragraphs.

Fig. 3: A here library of lattice symmetries could be accessed by shifting the particle Main and DNA shell.

You can also find numerous materials that resemble crystals but are actually polycrystals. Polycrystals form when microscopic crystals fuse jointly to type a good. These components will not encompass purchased lattices.

Lattices could have a person lattice position for every cell or more than one, yielding a complete of fourteen Bravais crystal lattice types. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the three-dimensional array created by a list of discrete details.

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:

26Some of the finest drinking glasses are comprised of direct crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》

本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核,经科普中国·科学百科认�?。

[ C/U ] transparent glass of top of the range, usually with its surface area Slice into styles that mirror light

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。

正常的水晶在生长时,多可以发现和柱形尖端棱线平行的生长纹(development traces)。由于在地底、岩洞中的生长空间多狭窄,尤其在遇到地震时,或地壳变动时,甚至容易遭到其他矿石的挤压,常常会压迫产生不同的「晶面」。还有,当水晶还是在液态状的时候,常常也会包覆着其他的矿石、泥灰一起结晶成长,如金红石(稍后变成发晶)、火山泥灰(稍后变成幻影水晶)等等。所有的这些,都是「自然的一部分」,请不要视为「瑕疵」。

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。

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