The Greatest Guide To Crystal
The Greatest Guide To Crystal
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A stable is crystalline if it's got prolonged-variety get. Once the positions of an atom and its neighbours are regarded at a person position, the position of every atom is understood specifically all through the crystal. Most liquids lack extensive-variety order, Despite the fact that quite a few have shorter-range order. Shorter vary is defined as the very first- or next-nearest neighbours of the atom. In many liquids the first-neighbour atoms are arranged in a similar construction as during the corresponding stable period.
Crystals are lovely rock formations which have surprised humans for A large number of decades. They are useful for several various things, not just for decoration. Many of the 1st radios ever invented utilised crystals to transmit the radio waves. Some instruments, like quartz watches and laser crystals, use Exclusive properties and harmonic abilities of crystals to produce remarkably exact 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。
Fig. four: Constructing blocks with distinct shapes and floor chemistries immediate the development of unique crystal symmetries.
结晶�?When sea h2o is allowed to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
⑦、镀彩：运用类似电镀的手法在水晶表面以不同的色彩，层面较薄，经摩擦可划伤�?；出现划痕，由于镀彩经常位于底部，因此在镀彩底部经常采用其它对象附着，如生肖文镇。
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：
[ C/U get more info ] clear glass of top quality, usually with its surface area Slash into designs that reflect light
With the Cambridge English Corpus We are saying the chain topology in the substantial w area acts given that the proverbial ' scratch-on-theglass ' wanted in the natural and organic chemistry laboratory to make crystals. In the Cambridge English Corpus Regular-tension and temperature molecular-dynamics simulations of crystals with the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus Along with these, dust particles happen to be noticed in lower-temperature plasmas, like People used in plasma processing and plasma crystals. Within the Cambridge English Corpus The final A part of the reserve concentrates on peculiarities of strongly coupled dusty plasmas, such as the development of dust crystals and involved beautiful forces. Through the Cambridge English Corpus Entire characterization of harm threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. In the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, Most important morphologies were not observed. Through the Cambridge English Corpus See all examples of crystal These examples are from corpora and from resources on the net. Any viewpoints within the examples never signify the belief of your Cambridge Dictionary editors or of Cambridge College Push or its licensors.
正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（progress strains）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。
压电性：水晶晶体受到压力时会产生电荷；反之，受到电压作用时，晶体会产生频率很高的振动。水晶具有可使压力与电荷相互转移的性能，称压电性。
对于紫水晶黄水晶这样的单色水晶，通常要观察它的二色性，即使是最顶级的紫水晶黄水晶也是有色差的，通过这个方法可以鉴别是否加色。