Facts About Crystal Revealed
Facts About Crystal Revealed
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27Local economists have appeared into their crystal balls and seen one thing alternatively horrible.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
Crystals are wonderful rock formations which have stunned people for Countless many years. These are used for quite a few different things, not just for decoration. Most of the to start with radios ever invented used crystals to transmit the radio waves. Some devices, like quartz watches and laser crystals, use Unique Qualities and harmonic abilities of crystals to create highly accurate measurements and adjustments.
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。
根据美国已经了解的情况，统计局的专家和其他人口统计学家在他们的视野中提供了一个不可抗拒的水晶球。
发晶，包括钛晶，铜顺发，绿发晶，黑发晶，银发晶，杂色发晶，其中钛晶最珍贵，少数钛晶价值可比钻石，红宝石和蓝宝石以及祖母绿。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
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包裹体常见有固相、固液气三相组合、空洞以及双晶、色带等。水晶中典型的同生包裹体有自形的锐钛矿、气液两相包体等。
crystal The recently crystallized quartz grains are characterised by elongate crystals oriented oblique on the shear band margins, defining a standard grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology while in the higher w location acts because the proverbial ' scratch-on-theglass ' essential during the organic chemistry laboratory to make crystals. 来自 Cambridge English Corpus The age scatter among the person crystals may possibly reflect incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to check here pale brown, subhedral to anhedral crystals, sometimes that contains inclusions of plagioclase microlaths and opaque phases.
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You can find just a few distinct unit-cell shapes, so many various crystals share a single device-cell style. A significant attribute of the unit mobile is the volume of atoms it includes. The entire range of atoms in the complete crystal may be the quantity in Each individual cell multiplied by the amount of unit cells. Copper and aluminum (Al) Every single have just one atom for each unit cell, while zinc (Zn) and sodium chloride have two. Most crystals have only a few atoms for every unit mobile, but there are several exceptions. Crystals of polymers, for instance, have A huge number of atoms in Just about every unit mobile.
14For illustration, We've got Quartz crystal clocks and watches correct to inside just one minute a yr.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
This crystal structure is chargeable for the unique physical and chemical Qualities of sodium chloride, which include its significant melting point, electrical conductivity, and talent to sort ionic bonds easily.