看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
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A crystal framework concentrates on how the atoms are organized Within the crystal. Nonetheless, crystallographers are interested in the general shape and measurement of the crystal along with its external features. To accomplish this, they should understand about the crystal system.
Tetragonal: These crystals sort prisms and double pyramids. The construction is sort of a cubic crystal, apart from a single axis is for a longer time than the opposite.
2She was donning a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
The elements are found in a variety of crystal packing arrangements. The most common lattice structures for metals are All those received by stacking the atomic spheres into quite possibly the most compact arrangement.
Lots of crystals behave like butter in that they are hard at low temperatures but tender at larger temperatures. They are referred to as solids in the least temperatures under their melting place. A feasible definition of a stable is definitely an object that retains its condition if still left undisturbed. The pertinent issue is how much time the object keeps its form. A hugely viscous fluid retains its condition for an hour but not a 12 months. A good should retain its shape for a longer period than that.
crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique into the shear band margins, defining a standard grain-condition foliation. 来自 Cambridge English Corpus We say the chain topology inside the significant w area functions because the proverbial ' scratch-on-theglass ' required inside the organic chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter among the the individual crystals may well replicate incorporation of xenocrysts from earlier magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene kinds neutral to pale brown, subhedral to anhedral crystals, at times containing inclusions of plagioclase microlaths and opaque phases.
16I opened the box and observed a piece of crystal snowflake and a greeting card with "Happy Birthday" during the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
Crystals are not just renowned for their Actual physical appearance, but diverse crystals of different resources and formations may end up in an enormous assortment of utilizes and Actual physical properties.
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。
The C60 molecules, also called buckyballs, are very strong and Virtually incompressible. Crystals are shaped these types of that the balls are organized within an fcc lattice with a one particular-nanometre spacing between the centres of adjacent balls. The equivalent C70 molecule has The form of a rugby ball; C70 get more info molecules also form an fcc crystal when stacked together. The good fullerenes form molecular crystals, with weak binding—furnished by van der Waals interactions—between the molecules.