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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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。
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《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
, has a similar composition, but There are 2 options for selecting the holes the atoms will occupy. The 3rd layer could be positioned in excess of the atoms of the first layer, generating an alternate layer sequence A
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
Crystals may be grown less than moderate conditions from all ninety two In a natural way happening features apart from helium, and helium is usually crystallized at low temperatures by making use of 25 atmospheres of strain.
水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。
say cheese something which somebody who is using a photograph of you lets you know to say so that the mouth can make The form of the smile
看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。
You'll find only some various unit-cell shapes, so many alternative crystals share only one device-cell style. An essential attribute of the unit mobile is the number of atoms it has. The overall range of atoms in the complete crystal could be the variety in Every single cell multiplied by the amount of unit cells. Copper and aluminum (Al) Just about every have 1 atom for each device cell, whilst zinc (Zn) and sodium chloride have two. Most crystals have only some atoms for each device cell, but there are several exceptions. Crystals of polymers, one example is, have thousands of atoms in Each and every device mobile.
《古今小说·李公子救蛇获称心》：“器皿皆是玻璃、水晶、琥珀、玛瑙为之，曲尽巧妙，非人间所有。”
crystal Alteration is variable: absent in lots of crystals, in Many others creating dense sericite aggregates which may present some recrystallization outcomes to produce coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are occasionally arranged in aggregates. In the Cambridge English Corpus In addition, haloarchaeal cells ended up embedded within salt crystals underneath laboratory problems and subsequently analysed by mild microscopy. Through the Cambridge English Corpus The white clouds (normally sparse) ended up also broadly considered to be becoming composed of tiny crystals of water ice, instead like cirrus inside our environment. Through the Cambridge English Corpus They're present in evaporite salt lakes and can be trapped in salt crystals throughout evaporation. Through the Cambridge English Corpus Therefore, the cells (organelles and membranes) are ruined mechanically by ice crystals, bringing about Demise by way of cell lysis. Through the Cambridge English Corpus The crystals were Employed in the first or next orders of reflection. In the Cambridge English Corpus In our 8xperiments, the crystals have been cubes which has a base location of 8 e read more mm. From your Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : effect of temperature and strain.