Crystal Things To Know Before You Buy
Crystal Things To Know Before You Buy
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A solid is crystalline if it has long-array purchase. As soon as the positions of an atom and its neighbours are regarded at one position, the put of every atom is known specifically through the entire crystal. Most liquids lack long-range buy, While numerous have limited-selection purchase. Shorter selection is outlined as the primary- or next-closest neighbours of an atom. In lots of liquids the very first-neighbour atoms are arranged in exactly the same composition as within the corresponding sound section.
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。
4Without a crystal ball, It truly is impossible to state where we are going to be subsequent year.不用水晶球预卜未来，我们说不准明年处境如何呀。《牛津词典》
Big crystals of diamond are valuable gemstones. The crystal has other exciting Homes; it's got the highest audio velocity of any strong and is the best conductor of warmth. Apart from diamond, the other prevalent type of carbon is graphite, which happens to be a layered materials. Just about every carbon atom has a few coplanar near neighbours, forming an arrangement known as the honeycomb lattice. A few-dimensional graphite crystals are acquired by stacking related layers.
. These four buildings comprise the majority of the binary crystals with equivalent figures of cations and anions.
These examples are from corpora and from sources on the internet. Any thoughts during the examples tend not to characterize the feeling with the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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�?
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Metallic Crystals: Metals normally kind metallic crystals, where many of the valence electrons are free of charge to maneuver all over the lattice. Iron, by way of example, can kind distinct metallic crystals.
多色�?无色水晶没有多色性。有色水晶有弱到强的多色�?表现为体色的不同深浅。
In the Cambridge English Corpus We say the chain topology inside the substantial w location functions given that the proverbial ' scratch-on-theglass ' wanted in the natural and organic chemistry laboratory to produce crystals. From your Cambridge English Corpus Frequent-tension and temperature molecular-dynamics simulations of crystals on the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. Within the Cambridge English Corpus As well as these, dust particles happen to be observed in lower-temperature plasmas, like People Utilized in plasma processing and plasma crystals. From the Cambridge English Corpus The ultimate part of the ebook focuses on peculiarities get more info of strongly coupled dusty plasmas, like the development of dust crystals and affiliated desirable forces. Within the Cambridge English Corpus Full characterization of injury threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. With the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, Principal morphologies were not noticed. In the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from resources on the net. Any opinions within the illustrations never stand for the view on the Cambridge Dictionary editors or of Cambridge College Push or its licensors.
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
Crystals are categorised on the whole types, including insulators, metals, semiconductors, and molecular solids. Just one crystal of the insulator will likely be clear and resembles a piece of glass. Metals are shiny Until they've got rusted. Semiconductors are occasionally shiny and often clear but are never ever rusty. Lots of crystals might be categorised as one variety of sound, while others have intermediate behaviour. Cadmium sulfide (CdS) could be well prepared in pure sort and is a wonderful insulator; when impurities are extra to cadmium sulfide, it becomes an interesting semiconductor.
水晶观赏石是天然水晶中最具代表的作品，具有其他宝石都不具备的观赏性。不论是玉石翡翠还是都要经过雕琢后次能体现他的价值，而水晶观赏石只需要将表面进行抛光，即展现出晶体内所包裹的物质，直接欣赏原汁原味的水晶石。