5 Simple Statements About Crystal Explained
5 Simple Statements About Crystal Explained
Blog Article
17These rings are indicative on the crystal framework of nickel and might be defined only by invoking wavelike Attributes of sunshine.这些光圈表明了了镍的晶体结构，而且只能通过光线中波的特征来解释。
杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。
天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。
Encyclopaedia Britannica's editors oversee topic parts through which they've got substantial information, whether from many years of expertise acquired by working on that content or by way of analyze for an advanced degree. They produce new material and confirm and edit written content obtained from contributors.
C2 [ U ] transparent glass of very high-quality, usually with its area Slash into fragile styles:
Lattices may have 1 lattice position for each cell or multiple, yielding a total of fourteen Bravais crystal lattice forms. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the 3-dimensional array produced by a set of discrete factors.
Include to phrase listing Add to word listing [ C/U ] clear rock that looks like ice, or perhaps a bit of it
11I very carefully opened the package deal and located a crystal bell inside.我小心地打开包裹，发现里面有一个水晶钟。
水晶包裹体丰富多彩，从气体、液体到各种矿物质，甚至宝石，均可被包含于水晶内，各种包裹体所形成的景象更是变化万千。按照包裹体的内容，常把包裹体水晶分为一下八类：
crystal The recently crystallized quartz grains are characterized by elongate crystals oriented oblique towards the shear band margins, defining a standard grain-form foliation. 来自 Cambridge English Corpus We say the chain topology in the significant w area functions given that the proverbial ' scratch-on-theglass ' necessary inside the natural chemistry laboratory to generate crystals. 来自 Cambridge English Corpus The age scatter among the the person crystals could reflect incorporation of xenocrysts from earlier magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene forms neutral to pale brown, subhedral to anhedral crystals, at times that contains inclusions of plagioclase microlaths and opaque phases.
. The second layer is shaded while in the figure. It's the exact same airplane-triangular framework; the atoms sit inside the holes formed by the 1st layer. The primary layer has two equivalent sets of holes, even so the atoms of the 2nd layer can occupy only one set. The 3rd layer, labeled C
Molecular Crystals: Complete molecules are bonded to each other within an arranged method. A very good case in point is usually a sugar crystal, which has sucrose molecules.
水晶饰品越来越受到人们的喜爱。中国、日本、韩国、美国等国家的人们还对水晶球情有独钟，喜欢将它们摆在家里或办公室里，认为水晶球有灵性，能保平安，带来财运。不过天然水晶不像看起来那么晶莹剔透，它也有瑕疵，我们在选购饰品的时候要注意。此外，我们还要掌握水晶的评价依据、选购方法，这样可以帮助我们在琳琅满目的水晶饰品中选到心仪的水晶。
The C60 molecules, also known as buckyballs, are website rather robust and almost incompressible. Crystals are fashioned this sort of which the balls are organized in an fcc lattice which has a a single-nanometre spacing involving the centres of adjacent balls. The very similar C70 molecule has the shape of a rugby ball; C70 molecules also type an fcc crystal when stacked together. The stable fullerenes kind molecular crystals, with weak binding—supplied by van der Waals interactions—concerning the molecules.