Not known Facts About Crystal
Not known Facts About Crystal
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A strong is crystalline if it's prolonged-variety purchase. Once the positions of the atom and its neighbours are identified at a person point, the area of each and every atom is known precisely all over the crystal. Most liquids lack long-vary buy, Despite the fact that many have limited-vary get. Shorter vary is defined as the initial- or second-nearest neighbours of an atom. In several liquids the primary-neighbour atoms are organized in a similar structure as within the corresponding solid phase.
Crystals are beautiful rock formations that have impressed human beings for 1000s of many years. They may be useful for quite a few various things, not only for decoration. A lot of the initially radios at any time invented made use of crystals to transmit the radio waves. Some devices, like quartz watches and laser crystals, use special properties and harmonic abilities of crystals to help make remarkably precise measurements and changes.
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
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。
水胆水晶，包括气态，液态，固态，有时候可以同时多态并存，无色居多，个别情况下可见红色，绿色，黄色，蓝色，黑色等。
Lattices could possibly have 1 lattice level for every cell or multiple, yielding a total of 14 Bravais crystal lattice kinds. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the three-dimensional array created by a list of discrete factors.
⑦、镀彩：运用类似电镀的手法在水晶表面以不同的色彩，层面较薄，经摩擦可划伤�?；出现划痕，由于镀彩经常位于底部，因此在镀彩底部经常采用其它对象附着，如生肖文镇。
市场上有很多人把熔炼水晶也叫做合成水晶，那是不准确的，一般都是以水晶废料为原料在高温高压下熔炼出来的，而不是结晶成的，不具备水晶的晶体特性，所以不能把熔炼水晶与合成水晶混为一谈；但是熔炼水晶耐高温，用优质二氧化硅熔炼成的熔炼水晶可以做成实用产品比如水晶杯、烤盘、茶具等，实际上一代伟人毛泽东主席的水晶棺就是选用东海优质水晶熔炼而成的。
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�?。
crystal The recently crystallized quartz grains are characterised by elongate crystals oriented oblique to your shear band margins, defining a normal grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology within the large w area acts given that the proverbial ' scratch-on-theglass ' desired while in the organic and natural chemistry laboratory to create crystals. 来自 Cambridge English Corpus The age scatter among the person crystals may well mirror incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral to anhedral crystals, from time to time containing inclusions of plagioclase microlaths and opaque phases.
Browse cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal apparent idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Test your vocabulary with our fun picture quizzes
Crystal Lattices You will find seven devices of crystal buildings, which might be also called lattices or Area lattices:
The structure of your sodium atoms by itself, or the chlorine atoms by itself, is fcc and defines the device cell. The sodium chloride here composition thus is made up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) is predicated to the bcc composition; each individual other atom is cesium or chlorine. In cases like this, the device cell is a cube. The third essential framework for AB
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。