27Local economists have looked into their crystal balls and noticed some thing alternatively awful.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》
A elementary notion in crystal buildings could be the unit mobile. It is the smallest unit of quantity that allows similar cells to generally be organized alongside one another to occupy all available Area. The geometrical basis of all crystals is the lattice. A lattice can be seen as an everyday and infinite arrangement of points or atoms, the place Each and every place or atom has A similar encompassing atmosphere.
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
Large crystals of diamond are useful gemstones. The crystal has other interesting Attributes; it has the best sound velocity of any reliable and is the greatest conductor of warmth. Aside from diamond, one other popular method of carbon is graphite, which happens to be a layered materials. Every single carbon atom has 3 coplanar near neighbours, forming an arrangement known as the honeycomb lattice. Three-dimensional graphite crystals are received by stacking equivalent layers.
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
Not all crystals type in drinking water, but nearly all crystals kind a similar way, atoms arrive together and become a uniformed cluster. The method may take as small as a couple of days to maybe a thousand years. Organic crystals that originate from the Earth variety a similar way.
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。
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。
本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。
Solids that have short-assortment order but absence extensive-vary get are named amorphous. Nearly any material may be designed amorphous by rapid solidification with the melt (molten state). This affliction is unstable, and the strong will crystallize in time. If the timescale for crystallization is many years, then the amorphous state seems secure.
All crystal ball crystal distinct copyright liquid crystal crystal lattice crystal framework liquid crystal display See all meanings Idioms and phrases crystal distinct idiom
There are actually only some unique device-mobile styles, so a number of crystals share just one device-cell sort. Crystal An important characteristic of a unit cell is the quantity of atoms it consists of. The full number of atoms in your entire crystal is the quantity in Each and every cell multiplied by the number of device cells. Copper and aluminum (Al) Each individual have a single atom for each device cell, although zinc (Zn) and sodium chloride have two. Most crystals have only some atoms per device mobile, but there are a few exceptions. Crystals of polymers, for instance, have A large number of atoms in Every device cell.
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。
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