Not all crystals are equally crystalline. There are frequently impurities, as well as the ionic & covalent involving molecules can create vastly diverse constructions away from a similar materials. An excellent illustration of this are diamonds and graphene.
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。
A crystal construction concentrates on how the atoms are arranged inside the crystal. However, crystallographers have an interest in the general shape and dimension from the crystal and its exterior features. To perform this, they have to know about the crystal system.
Tetragonal: These crystals form prisms and double pyramids. The composition is sort of a cubic crystal, except a person axis is lengthier than the opposite.
这种水晶观赏石特指水晶晶簇，它是众多单晶体集中生长在一起的晶体组合。晶簇以其晶莹剔透、独特造型而享誉水晶赏石界。
结晶�?When sea drinking water is allowed to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
Crystals glimpse special from a number of other rocks and minerals, but �?barring several Specific conditions �?nearly all minerals conceal a crystalline framework beneath the surface.
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。
Q.four. What is the distinction between atomic construction and crystal structure? Ans. The principal difference between atomic structure and crystal composition lies of their definitions: atomic construction refers to how atoms are arranged in a one molecule or a cluster of molecules, While crystal framework concerns the precise arrangement of atoms inside a solid substance.
crystal The freshly crystallized quartz grains are characterised by elongate crystals oriented oblique to your shear band margins, defining a standard grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology from the high w location functions as the proverbial ' scratch-on-theglass ' required from the organic chemistry laboratory to produce crystals. 来自 Cambridge English Corpus The age scatter more info among the the individual crystals may well replicate incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene kinds neutral to pale brown, subhedral to anhedral crystals, sometimes containing inclusions of plagioclase microlaths and opaque phases.
The basic models of solids are either atoms or atoms that have combined into molecules. The electrons of the atom shift in orbits that type a shell construction across the nucleus. The shells are crammed in a systematic buy, with each shell accommodating only a small variety of electrons. Diverse atoms have distinctive figures of electrons, which might be dispersed in a very characteristic Digital composition of stuffed and partly stuffed shells.
水晶形成后由于外力作用或某种人为原因使水晶产生大的裂隙或裂纹，这种裂纹有大有小，对水晶的影响也有大小之分。
在透明的水晶中，隐裂纹呈亮晶晶的片状，有时还会有晕彩效应。这些裂纹是水晶在生长过程中，遇到外力挤压而在内部产生的一些隐形裂纹，隐裂纹在芙蓉石、紫水晶、白水晶球及白水晶柱中都很常见。有的裂纹后来被物质填充，形成愈合的裂纹，也就是原来的裂纹又长住了。这种裂纹对水晶的影响相对要小一些。
Another method of crystalline carbon is based on a molecule with sixty carbon atoms named buckminsterfullerene (C60). The molecular shape is spherical. Each carbon is bonded to 3 neighbours, as in graphite, plus the spherical form is reached by a mixture of twelve rings with 5 sides and 20 rings with six sides. Similar constructions ended up initially visualized through the American architect R. Buckminster Fuller for geodesic domes.