Fascination About Crystal
Fascination About Crystal
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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
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。
The purchased inside composition of huge crystals, much like the fluorite and quartz revealed listed here, is mirrored of their geometric shapes.
这种水晶观赏石特指水晶晶簇，它是众多单晶体集中生长在一起的晶体组合。晶簇以其晶莹剔透、独特造型而享誉水晶赏石界。
结晶�?When sea water 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。
如果水晶内部杂质中有传说中人物的造型，如佛、星座、生肖等价值可能要高于同等颜色和净度的水晶。
Numerous crystals behave like butter in that they're challenging at very low temperatures but smooth at increased temperatures. They can be named solids in any way temperatures beneath their melting stage. A doable definition of the stable is really an object that retains its form if remaining undisturbed. The pertinent challenge is just how long the article retains its condition. A really viscous fluid retains its form for one hour but not a yr. A strong must preserve its shape lengthier than that.
颜色：无色，浅至深的紫色，浅黄、中至深黄色，浅至深褐、棕色，绿至黄绿色，浅至中粉红。
In the Cambridge English Corpus We are saying the chain topology in the large w area functions since the proverbial ' scratch-on-theglass ' desired in the organic chemistry laboratory to make crystals. From the Cambridge English Corpus Continuous-force and temperature molecular-dynamics simulations of crystals with the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus Besides these, dust particles are actually noticed in lower-temperature plasmas, like All those Utilized in plasma processing and plasma crystals. From your Cambridge English Corpus The ultimate Section of the guide concentrates on peculiarities of strongly coupled dusty plasmas, including the development of dust crystals and involved eye-catching forces. Through the Cambridge English Corpus Full characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. From the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, Major morphologies weren't noticed. From the Cambridge English Corpus See all examples of crystal These examples are from corpora and from sources on the net. Any viewpoints in the illustrations do not characterize the viewpoint with the Cambridge Dictionary editors or of Cambridge College Press or its licensors.
You can find only a few distinctive device-cell styles, so many alternative crystals share just one unit-cell type. A very important attribute of the unit cell is the more info quantity of atoms it has. The total amount of atoms in all the crystal is definitely the range in Just about every cell multiplied by the volume of device cells. Copper and aluminum (Al) Each individual have 1 atom for every device mobile, though zinc (Zn) and sodium chloride have two. Most crystals have only some atoms for every unit mobile, but usually there are some exceptions. Crystals of polymers, by way of example, have thousands of atoms in Every unit mobile.
crystal, any solid material where the part atoms are organized inside a definite sample and whose floor regularity demonstrates its inner symmetry.
Tetragonal �?Characterised by a few mutually perpendicular axes, two of which can be equivalent in size, though the third is more time or shorter and perpendicular to the opposite two.