水晶表面坑洼的地方,有的深,有的浅,这是水晶在成长过程中自然形成的,并非是人为造成的损伤。缺陷位置本来包有其他矿物晶体,由于包裹体和水晶结合部位的结合力不强,当表面抛光时,矿体脱落,留下空位。这种缺陷在绿幽灵、钛晶、金发晶上都比较常见。
③、粗抛光:是将模具压出之毛胚,以金刚石盘直接磨出成品之刻线。④、细抛光:在粗抛光之后,以抛光粉来磨成品至晶莹剔透为止。
4Without a crystal ball, It is not possible to convey wherever we will be subsequent yr.不用水晶球预卜未来,我们说不准明年处境如何呀。《牛津词典》
Fig. seven: A template-directed solution can Management The location of creating blocks on the surface inside the formation of complex structures.
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》
Lattices could have a single lattice point for each mobile or multiple, yielding a total of 14 Bravais crystal lattice varieties. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the 3-dimensional array produced by a list of discrete factors.
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位,而对水晶来说,颜色和净度(水晶行业称作晶体)是近乎同等重要的因素:
Ionic Crystals: Electrostatic forces variety ionic bonds. A traditional illustration is actually a halite or salt crystal.
One of the binary crystals, the easiest buildings to visualize are those with equivalent figures of the two types of atoms. The structure of sodium chloride relies on the cube. To construct the lattice, the sodium and chlorine atoms are placed on alternate corners of a cube, plus the structure is repeated (Figure 3B).
[ C/U ] clear glass of top quality, ordinarily with its area Minimize into patterns that mirror gentle
From your Cambridge English Corpus We are saying the chain topology within the high w area functions since the proverbial ' scratch-on-theglass ' essential in the organic and natural chemistry laboratory for making crystals. Within the Cambridge English Corpus Continuous-force and temperature molecular-dynamics simulations of crystals from the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. With the Cambridge English Corpus Together with these, dust particles have already been noticed in very low-temperature plasmas, like those Employed in plasma processing and plasma crystals. From the Cambridge English Corpus The ultimate Section of the e book concentrates on peculiarities of strongly coupled dusty plasmas, such as the formation of dust crystals and connected appealing forces. Through the Cambridge English Corpus Total characterization of harm threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. With the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, Principal morphologies weren't noticed. Through the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from sources on the net. Any views from the examples never characterize the view on the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
Orthorhombic: They are rhombic prisms and dipyramids that resemble tetragons but with no sq. cross-sections.
⑦双色水晶:一种紫色和黄色共存一体的水晶,紫色、黄色之间界限较明显,分别占据晶块的一部分。
crystal Alteration is variable: absent in several crystals, in Many others manufacturing dense sericite aggregates which can show some recrystallization consequences to create coarser-grained white mica. From the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes organized in aggregates. In the Cambridge English Corpus Moreover, haloarchaeal cells were being embedded inside of salt crystals underneath laboratory ailments and subsequently analysed by light microscopy. Within the Cambridge English Corpus The white clouds (normally sparse) had been also widely viewed as currently being made up of small crystals of drinking water ice, alternatively like cirrus within our ambiance. In the more info Cambridge English Corpus They may be located in evaporite salt lakes and may be trapped in salt crystals all through evaporation. From the Cambridge English Corpus Therefore, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to Demise through cell lysis. In the Cambridge English Corpus The crystals ended up used in the primary or second orders of reflection. Through the Cambridge English Corpus Inside our 8xperiments, the crystals had been cubes that has a foundation location of eight e mm. Through the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and pressure.
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