5 Simple Techniques For Crystal
5 Simple Techniques For Crystal
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A solid is crystalline if it's got prolonged-assortment buy. When the positions of an atom and its neighbours are identified at a single stage, the place of each atom is understood exactly all through the crystal. Most liquids absence extensive-array purchase, Whilst a lot of have brief-range get. Limited range is outlined as the first- or 2nd-nearest neighbours of the atom. In many liquids the initial-neighbour atoms are organized in the exact same composition as during the corresponding strong section.
Crystals are wonderful rock formations which have shocked humans for Many decades. They're employed for numerous various things, not just for decoration. Many of the to start with radios at any time invented used crystals to transmit the radio waves. Some devices, like quartz watches and laser crystals, use Specific properties and harmonic capabilities of crystals to generate very correct measurements and adjustments.
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 requested interior framework of large crystals, just like the fluorite and quartz demonstrated right here, is mirrored in their geometric styles.
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。
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
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。
26Some of the finest consuming Eyeglasses are constructed from lead crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
Quite a few crystals behave like butter in that they are really hard at minimal temperatures but tender at increased temperatures. They're referred to as solids in any way temperatures underneath their melting position. A attainable definition of the read more stable is definitely an item that retains its form if remaining undisturbed. The pertinent challenge is how much time the article keeps its form. A very viscous fluid retains its condition for one hour although not a calendar year. A strong will have to retain its form longer than that.
广义的包裹体是指宝石内部含有的与主晶宝石化学成分、物理性质等不同的物质。
用手去触摸水晶，天然水晶通常温度要比人造水晶的要凉的多；用眼观察，天然水晶通常有棉絮状的包裹体，这个是人造水晶所没有的。
The arrangement of the atom’s electrons decides its chemical Attributes. The properties of solids are generally predictable from the Attributes in their constituent atoms and molecules, and the various shell structures of atoms are therefore answerable for the diversity of solids.
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。
crystal Alteration is variable: absent in several crystals, in Many others producing dense sericite aggregates which can clearly show some recrystallization effects to provide coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally organized in aggregates. Through the Cambridge English Corpus On top of that, haloarchaeal cells were being embedded in salt crystals under laboratory situations and subsequently analysed by mild microscopy. Through the Cambridge English Corpus The white clouds (typically sparse) had been also commonly viewed as becoming composed of very small crystals of water ice, fairly like cirrus in our atmosphere. In the Cambridge English Corpus They may be found in evaporite salt lakes and might be trapped in salt crystals during evaporation. Through the Cambridge English Corpus Therefore, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to Loss of life by way of cell lysis. In the Cambridge English Corpus The crystals have been Employed in the primary or second orders of reflection. Through the Cambridge English Corpus Inside our 8xperiments, the crystals were being cubes with a base spot of eight e mm. Through the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : impact of temperature and strain.