Not known Factual Statements About Crystal
Not known Factual Statements About Crystal
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天然的水晶一般都会有絮状（绵绺），也就是大家俗称的瑕疵，这是液体水落石出和二氧化碳的小孔穴，而人工合成的水晶就不会有这样的特征。
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
水晶文化历史悠久，古人曾赋予它一串极富美感的雅称：水玉、水精、水碧、石英等。
Most strong materials present in nature exist in polycrystalline kind rather then as only one crystal. They are actually made up of an incredible number of grains (modest crystals) packed collectively to fill all space. Each individual person grain has another orientation than its neighbours. Though extensive-selection purchase exists inside a single grain, on the boundary concerning grains, the buying variations route. A normal piece of iron or copper (Cu) is polycrystalline.
Additionally, there are lots of components that resemble crystals but are actually polycrystals. Polycrystals form when microscopic crystals fuse with each other to form a reliable. These resources will not consist of ordered lattices.
Not all crystals form in water, but nearly all crystals sort precisely the same way, atoms come jointly and become a uniformed cluster. The method may take as little as a couple of days to maybe a thousand years. All-natural crystals that originate from the Earth kind a similar way.
Increase to term list Add to term record [ C/U ] clear rock that appears like ice, or maybe a piece of it
Crystals are almost nothing much more than an requested arrangement of molecules or atoms. Crystals can be found in a number of styles and sizes, and each one has distinctive features. What they are made of establishes how it is going to form.
仿制钛晶树水晶：钛晶是水晶里价格最昂贵的，造假者当然也不会放过这么好的产品。天然的环境下，在水晶里能生长个像树一样的钛晶，完全是可能的，只是这样的货很少，那我们的造假专家是如何做的呢，白水晶底下打个洞，激光打点成板状的钛晶进去，就这样这块水晶的身价就能飙升几十倍。往往有的钛晶戒面，会采用将钛晶部位割成板状，与圆面的水晶粘合的方法来制作。
crystal The newly crystallized quartz grains are characterised by elongate crystals oriented oblique on the shear band margins, defining an average grain-condition foliation. 来自 Cambridge English Corpus We are saying the chain topology while in the substantial w area acts because the proverbial ' scratch-on-theglass ' required inside the organic chemistry laboratory to produce crystals. 来自 Cambridge English Corpus The age scatter amongst the person crystals might 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, occasionally made up of inclusions of plagioclase microlaths and opaque phases.
From your Cambridge English Corpus We are saying the chain topology during the higher w region acts since the proverbial ' scratch-on-theglass ' necessary while in the natural and organic chemistry laboratory to create crystals. From the Cambridge English Corpus Constant-pressure and temperature molecular-dynamics simulations of crystals of your lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. Within the Cambridge English Corpus Besides these, dust particles are already noticed in very low-temperature plasmas, like People Employed in plasma processing and plasma crystals. With the Cambridge English Corpus The final A part of the e book concentrates on peculiarities of strongly coupled dusty plasmas, such as the formation of dust crystals and associated beautiful forces. In the Cambridge English Corpus Complete characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Through the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or maybe more irregular, Major morphologies were not observed. From the Cambridge English Corpus See all samples of website crystal These illustrations are from corpora and from sources on the web. Any thoughts while in the illustrations will not represent the viewpoint on the Cambridge Dictionary editors or of Cambridge College Push or its licensors.
Orthorhombic: These are typically rhombic prisms and dipyramids that resemble tetragons but devoid of square cross-sections.
14For case in point, We have now Quartz crystal clocks and watches correct to in a single moment a year.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
Binary crystals are located in several structures. Some pairs of things sort multiple structure. At home temperature, cadmium sulfide may possibly crystallize both within the zinc blende or wurtzite composition. Alumina also has two feasible buildings at room temperature, α-alumina (corundum) and β-alumina. Other binary crystals show distinctive buildings at unique temperatures. Among the many most complex crystals are Those people of silicon dioxide (SiO2), which has 7 unique buildings at many temperatures and pressures; the most typical of such constructions is quartz.