Crystal Can Be Fun For Anyone
Crystal Can Be Fun For Anyone
Blog Article
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。
⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体，这些包裹体的存在，影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质，与水晶整体不协调，被视为水晶的杂质，有这种杂质的水晶是次品。
These innovations involve exotic structures with programmable lattice symmetries and properly-described crystal routines, responsive materials that leverage the intrinsic Qualities of nucleic acids to manipulate constructions on demand from customers, nanoparticle superlattices grown epitaxially from surfaces and colloidal crystals that supply insights into mild–subject interactions. Wanting forward, we obstacle the community to leverage the extraordinary structural Manage afforded by crystal engineering with DNA to synthesize lessons of useful elements that thrust over and above what has been probable with Normally happening crystalline materials or Those people produced by far more typical approaches.
Incorporate to phrase checklist Increase to phrase list C2 [ U ] clear glass of incredibly high-quality, commonly with its floor cut into fragile styles
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
Learn the way the shape of the crystals determine different minerals into familiesMinerals crystallize In keeping with one of seven motifs, often called crystal systems.
30Three days went previous, and I had been stunned to determine it again: all of the openings were being sewed up by skinny and white thread they usually looked like the ice crystal on Winter season's branches from the north.
1A crystal chandelier lit the place.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》
Crystals tend to be viewed as a little something of immense splendor, plus they are commonly used with diamonds or other stones for making items of jewellery. Nearly all of crystals now are male-manufactured in laboratories.
crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique to the shear band margins, defining a standard grain-form foliation. 来自 Cambridge English Corpus We say the chain topology in the higher w location acts given that the proverbial ' scratch-on-theglass ' desired while in the organic chemistry laboratory to create crystals. 来自 Cambridge English Corpus The age scatter amongst the individual crystals might replicate incorporation of xenocrysts from earlier magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene sorts neutral to pale brown, subhedral to anhedral crystals, from time to time that contains inclusions of plagioclase microlaths and opaque phases.
There are 2 these types of attainable periodic arrangements. In Each individual, the first layer has the atoms packed right into a Crystal airplane-triangular lattice in which each and every atom has six instant neighbours. Figure two shows this arrangement for the atoms labeled A
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
The framework from the sodium atoms on your own, or the chlorine atoms alone, is fcc and defines the device cell. The sodium chloride composition As a result is produced up of two interpenetrating fcc lattices. The cesium chloride lattice (Determine 3A) is based over the bcc structure; each individual other atom is cesium or chlorine. In such a case, the device mobile is actually a dice. The third vital structure for AB
21You all know the way when you take a crystal prism and move a beam of daylight as a result of it, you have a spectrum, which looks like a ongoing band of rainbow colours.