How Much You Need To Expect You'll Pay For A Good Crystal
How Much You Need To Expect You'll Pay For A Good Crystal
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天然的水晶一般都会有絮状（绵绺），也就是大家俗称的瑕疵，这是液体水落石出和二氧化碳的小孔穴，而人工合成的水晶就不会有这样的特征。
A elementary idea in crystal structures could be the unit mobile. It is the smallest unit of quantity that allows equivalent cells to generally be arranged jointly to occupy all readily available space. The geometrical foundation of all crystals may be the lattice. A lattice might be seen as an everyday and infinite arrangement of points or atoms, where by each stage or atom has A similar bordering atmosphere.
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
Fig. 7: A template-directed tactic can Manage The location of creating blocks over a surface area within the formation of complicated buildings.
2She was wearing a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
Not all crystals form in water, but nearly all crystals sort exactly the same way, atoms occur together and turn into a uniformed cluster. The method normally takes as minimal as a couple of days to it's possible a thousand years. Organic crystals that come from the Earth sort the same way.
水晶内部有多种矿物包裹体，形成的各种景观可以肉眼观测，这样的水晶就是包裹体水晶观赏石。由于水晶本身就是宝石，因此人们称誉包裹体水晶为“宝石级的观赏石”。包裹体水晶观赏石都具有独特性，具有极高欣赏和收藏价值。
Hexagonal �?Characterised by 4 axes, a few of that happen to be equivalent in size and intersect at one hundred twenty degrees, having a fourth axis perpendicular to the other a few.
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�?。
晶体 Silicon crystals grown in a laboratory transform light into electrical Power. 在实验室中长成的硅晶体可将光线转变为电能。
There are two these possible periodic arrangements. In Every single, the very first layer has the atoms packed into a aircraft-triangular lattice in which each atom has six quick neighbours. Determine 2 shows this arrangement for your atoms labeled A
Crystallography would be the analyze of crystals, and it specials with every little thing from fantastic geometric designs to seemingly random conglomerations of particles and minerals.
Crystals are categorised in general categories, such as insulators, metals, semiconductors, and molecular solids. One crystal of the insulator is generally transparent and resembles a piece of glass. Metals are shiny Until they may have rusted. Semiconductors are sometimes shiny and sometimes clear but are hardly ever rusty. Lots of crystals may be classified as a single style of stable, while some have intermediate behaviour. Cadmium sulfide (CdS) is often well prepared in pure kind and is a wonderful insulator; when impurities are included to cadmium sulfide, it turns into a fascinating semiconductor.
crystal Alteration is variable: absent in several crystals, in Other folks manufacturing dense sericite aggregates which may demonstrate some recrystallization effects to provide coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are sometimes arranged in aggregates. From the Cambridge English Corpus Moreover, haloarchaeal cells had been embedded inside of salt crystals underneath laboratory problems and subsequently analysed by mild microscopy. In the Cambridge English Corpus The white clouds (normally sparse) have been also extensively considered to be remaining composed of tiny crystals of h2o ice, fairly like cirrus within our ambiance. With the Cambridge English Corpus They may be found in evaporite salt lakes and may be trapped in salt crystals in the course of evaporation. Through the Cambridge English Corpus Therefore, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to Demise by means of mobile lysis. From your Cambridge English Corpus The crystals have been read more used in the 1st or second orders of reflection. From your Cambridge English Corpus Within our 8xperiments, the crystals had been cubes that has a foundation area of 8 e mm. From the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : effect of temperature and stress.