The Basic Principles Of Crystal
The Basic Principles Of Crystal
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诗中“胜美玉”，“过冰清”，写出水晶的质地美，而“亦欲应时明”则描绘出水晶充满灵性的动态美，耐人寻味。罗维是有独特眼光，懂得水晶真谛，第一个称赞水晶超过美玉的伟大诗人。他的认识已被千年之后的科学理论所证实；以水晶为直接吟咏对象的诗篇还有：
杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
Big crystals of diamond are worthwhile gemstones. The crystal has other intriguing Houses; it's got the very best seem velocity of any reliable and is the greatest conductor of warmth. Aside from diamond, the other common method of carbon is graphite, that is a layered materials. Each carbon atom has three coplanar in close proximity to neighbours, forming an arrangement called the honeycomb lattice. A few-dimensional graphite crystals are attained by stacking comparable levels.
How Crystals Type The whole process of forming a crystal is named crystallization. Crystallization usually occurs whenever a solid crystal grows from the liquid or Alternative.
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根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?
Hexagonal �?Characterized by four axes, 3 of which can be equivalent in size and intersect at a hundred and twenty degrees, having a fourth axis perpendicular to the other 3.
13Nearly all computers incorporate a quartz-crystal clock to manage their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
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In the Cambridge English Corpus We are saying the chain topology in the superior w region functions since the proverbial ' scratch-on-theglass ' desired in the organic and natural chemistry laboratory to help make crystals. With the Cambridge English Corpus Consistent-tension and temperature molecular-dynamics simulations of crystals in the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus Along with these, dust particles have already been observed in minimal-temperature plasmas, like those Employed in plasma processing and plasma crystals. Within the Cambridge English Corpus The website final Element of the e-book focuses on peculiarities of strongly coupled dusty plasmas, like the development of dust crystals and linked interesting forces. From your Cambridge English Corpus Comprehensive characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Through the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or maybe more irregular, Principal morphologies were not noticed. From the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from sources on the net. Any viewpoints while in the examples tend not to depict the belief on the Cambridge Dictionary editors or of Cambridge College Push or its licensors.
Crystallography may be the research of crystals, and it deals with every thing from fantastic geometric designs to seemingly random conglomerations of particles and minerals.
⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。
crystal Alteration is variable: absent in several crystals, in Other individuals developing dense sericite aggregates which can show some recrystallization results to provide coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally arranged in aggregates. Through the Cambridge English Corpus Moreover, haloarchaeal cells ended up embedded within salt crystals below laboratory ailments and subsequently analysed by light microscopy. With the Cambridge English Corpus The white clouds (usually sparse) had been also greatly thought to be currently being composed of very small crystals of drinking water ice, alternatively like cirrus inside our ambiance. Through the Cambridge English Corpus They can be found in evaporite salt lakes and might be trapped in salt crystals in the course of evaporation. From the Cambridge English Corpus For that reason, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to death by cell lysis. Through the Cambridge English Corpus The crystals were being used in the very first or 2nd orders of reflection. From the Cambridge English Corpus Within our 8xperiments, the crystals were cubes which has a base location of eight e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : influence of temperature and strain.