A solid is crystalline if it's very long-range get. When the positions of the atom and its neighbours are recognized at just one level, the place of every atom is thought exactly throughout the crystal. Most liquids deficiency extensive-selection order, Whilst lots of have short-selection buy. Limited range is outlined as the first- or 2nd-nearest neighbours of the atom. In lots of liquids the first-neighbour atoms are arranged in a similar composition as inside the corresponding solid section.
A fundamental idea in crystal structures is definitely the device mobile. It is the smallest unit of quantity which allows identical cells to become organized alongside one another to occupy all available Place. The geometrical foundation of all crystals is the lattice. A lattice might be viewed as a regular and infinite arrangement of factors or atoms, exactly where Each individual level or atom has an identical surrounding natural environment.
A simple strategy in crystal constructions will be the unit cell. It is the smallest unit of quantity that permits identical cells being stacked with each other to fill all Area. By repeating the pattern on the unit mobile time and again in all directions, all the crystal lattice may be built. A cube is The best illustration of a unit mobile. Two other illustrations are shown in Figure 1. The main could be the unit cell for a confront-centred cubic lattice, and the next is to get a entire body-centred cubic lattice. These buildings are described in the subsequent paragraphs.
Fig. three: A library of lattice symmetries can be accessed by shifting the particle core and DNA shell.
水胆水晶，包括气态，液态，固态，有时候可以同时多态并存，无色居多，个别情况下可见红色，绿色，黄色，蓝色，黑色等。
, has precisely the same construction, but There are 2 alternatives for choosing the holes the atoms will occupy. The 3rd layer could be put in excess of the atoms of the main layer, creating an alternate layer sequence A
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
11I meticulously opened the deal and found a crystal bell inside.我小心地打开包裹，发现里面有一个水晶钟。
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crystal The newly crystallized quartz grains are characterised by elongate crystals oriented oblique to your shear band margins, defining an average grain-shape foliation. 来自 Cambridge English Corpus We are saying the chain here topology within the higher w region functions as the proverbial ' scratch-on-theglass ' desired from the natural chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter amongst the person crystals may possibly replicate incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral to anhedral crystals, at times made up of inclusions of plagioclase microlaths and opaque phases.
15The trick to a fantastic thermoelectric materials can be a crystal composition during which electrons can stream freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。
的释�?浏览 cryptologist cryptology cryptorchidism cryptosporidium crystal crystal ball crystal apparent idiom copyright crystalline #randomImageQuizHook.filename #randomImageQuizHook.isQuiz 用我们的趣味配图小测验考考你的词汇量
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。
The C60 molecules, also called buckyballs, are pretty strong and Practically incompressible. Crystals are formed such that the balls are organized within an fcc lattice which has a 1-nanometre spacing amongst the centres of adjacent balls. The very similar C70 molecule has The form of the rugby ball; C70 molecules also variety an fcc crystal when stacked together. The sound fullerenes kind molecular crystals, with weak binding—provided by van der Waals interactions—between the molecules.