Crystal Fundamentals Explained

Crystal Fundamentals Explained

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These crystals were being formed about one million yrs back In the Earth's crust. They manifest if the liquid from the Earth consolidates along with the temperature chills. Other crystals variety once the liquid will make its way with the clefts and dispense minerals to the clefts.

23Sometimes, on the other hand, the crystal kind of the silicate inclusions is observed to resemble far more intently the internal construction of diamond than that of other silicate minerals.然而，有时观察到硅酸盐包裹体的晶体形态比其他硅酸盐矿物更接近金刚石的内部结构。

Chemical Bonds The types of chemical bonds shaped in between atoms or teams of atoms in crystals depend upon their dimensions and electronegativity. There are 4 types of crystals as grouped by their bonding:

Increase to term checklist Add to phrase record C2 [ U ] clear glass of incredibly superior quality, commonly with its surface area Lower into delicate designs

2She was putting on a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》

These illustrations are from corpora and from sources on the web. Any viewpoints from the examples tend not to represent the feeling in the Cambridge Dictionary editors or of Cambridge College Push or its licensors.

光泽：玻璃光泽。断口处为油脂光泽。光泽，指宝石表面对光线反射的一种光学性质。观察水晶的光泽，可用手握着它，以灯光或窗户投进来的光线看表面反射，透明水晶亮度与光泽强弱有关。

Ionic Crystals: Electrostatic forces kind ionic bonds. A basic example is usually a halite or salt crystal.

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：

crystal website The freshly crystallized quartz grains are characterised by elongate crystals oriented oblique into the shear band margins, defining a normal grain-shape foliation. 来自 Cambridge English Corpus We are saying the chain topology during the substantial w area acts given that the proverbial ' scratch-on-theglass ' essential in the organic chemistry laboratory for making crystals. 来自 Cambridge English Corpus The age scatter among the individual crystals may possibly mirror incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene varieties neutral to pale brown, subhedral to anhedral crystals, sometimes made up of inclusions of plagioclase microlaths and opaque phases.

Solitary crystals of metals are tender and malleable, even though polycrystalline metals are harder and much better and tend to be more practical industrially. Most polycrystalline products is often created into large one crystals immediately after extended heat treatment. Before blacksmiths would warmth a piece of metallic to make it malleable: warmth tends to make several grains improve big by incorporating lesser ones. The smiths would bend the softened metallic into shape and afterwards pound it awhile; the pounding would help it become polycrystalline again, raising its energy.

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（expansion lines）。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」。

⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。

Fig. five: The ability to recognize defined crystal routines is dependent on the symmetry engineering tactic.