The best Side of Crystal
The best Side of Crystal
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Not all crystals are equally crystalline. There are sometimes impurities, along with the ionic & covalent concerning molecules can make vastly unique constructions from a similar materials. A great illustration of this are diamonds and graphene.
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。
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。
养殖晶：养殖晶是指，用天然水晶做种子，然后赋予天然水晶生长的高压条件，养殖器中有富含二氧化硅的分子。然后二氧化硅分子围绕天然水晶种生长，这样的水晶成分（分子式）与天然水晶是一摸一样的，唯一有差别的是，这样的水晶磁场作用没有天然水晶强。
You can also find a lot of supplies that resemble crystals but are literally polycrystals. Polycrystals variety when microscopic crystals fuse with each other to type a good. These components will not consist of ordered lattices.
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
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。
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。
13Nearly all personal computers have a quartz-crystal clock to regulate 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。
Crystals with evident flat faces are called euhedral crystals, although People lacking described faces are termed anhedral crystals. Crystals consisting of purchased arrays of atoms that aren't generally periodic are named quasicrystals.
Solitary crystals of metals are tender and malleable, although polycrystalline metals are tougher and more powerful and tend to be more handy industrially. Most polycrystalline supplies might be produced into huge single crystals immediately after prolonged warmth remedy. Up to now blacksmiths would warmth a piece of steel to really make it malleable: warmth tends to make a number of grains improve massive by incorporating more compact ones. The smiths would bend the softened steel into condition and then pound it awhile; the pounding would ensure it website is polycrystalline again, growing its energy.
的释�?浏览 cryptologist cryptology cryptorchidism cryptosporidium crystal crystal ball crystal very clear idiom copyright crystalline #randomImageQuizHook.filename #randomImageQuizHook.isQuiz 用我们的趣味配图小测验考考你的词汇量
This Evaluate chronicles more than twenty years of research into making a genetic code for crystal engineering. Rather than directing biological procedures, this code utilizes synthetic forms of DNA to programme the assembly of nanoparticles and microparticles into 1D, 2nd and 3D crystalline architectures, in which almost just about every facet of the resultant constructions might be systematically controlled. Within just this conceptual framework, the structural and practical advances are explained in order to determine the current volume of sophistication and also to forecast long run directions from the platform.
⑥白色的包裹体有蚀变的绿泥石、云母、愈合裂隙、水晶、方解石、透闪石等。