A reliable is crystalline if it's got prolonged-selection get. Once the positions of an atom and its neighbours are regarded at 1 stage, the area of every atom is known precisely all over the crystal. Most liquids deficiency long-variety buy, Whilst many have short-variety order. Limited selection is outlined as the first- or 2nd-nearest neighbours of an atom. In several liquids the main-neighbour atoms are organized in the identical structure as in the corresponding sound stage.
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。
A primary thought in crystal structures will be the unit cell. It is the smallest device of quantity that allows identical cells being stacked collectively to fill all House. By repeating the sample with the unit mobile time and again in all directions, all the crystal lattice can be produced. A dice is The only example of a unit mobile. Two other examples are demonstrated in Determine 1. The first is the device mobile for your facial area-centred cubic lattice, and the next is for your overall body-centred cubic lattice. These structures are stated in the next paragraphs.
Increase to word listing Incorporate to word checklist C2 [ U ] transparent glass of incredibly good quality, usually with its area Minimize into delicate designs
There are a number of crystals determined by geometric constructions, crystal development, and substance. There might be arrangements of hexagonal carbon atoms or amethyst which makes hexagonal pyramid constructions.
They may inevitably come up with a wonderful minimal uniform cluster of atoms, This can be the process of escalating crystals. The more they can occur with each other, the more of a formation might be seen to your bare eye. Scientists can determine what mineral they are taking a look at by how the crystals variety.
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
如果水晶内部杂质中有传说中人物的造型，如佛、星座、生肖等价值可能要高于同等颜色和净度的水晶。
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：
A crystal technique refers to the classification of crystals dependant on the geometric arrangement and symmetry of their lattice buildings. There are 7 major crystal systems:
16I opened the box and observed a bit of crystal snowflake and also a greeting card with "Happy Birthday" inside the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
国家还并未给天然水晶提供一个等级划分的具体标准，水晶品种繁杂，每一品种都有他不同的评判标准。
14For instance, We have now Quartz crystal clocks and watches accurate to inside just one moment a calendar year.例如，我们使用的每年误差不超过one分钟的石英水晶钟表和手表。
The C60 molecules, also known as buckyballs, are fairly solid and Practically incompressible. Crystals are formed these kinds of the balls are arranged within an fcc lattice using a a person-nanometre spacing in between the centres of adjacent balls. The very similar C70 molecule has The form of the rugby ball; C70 molecules also form an fcc crystal when stacked collectively. The stable fullerenes sort molecular crystals, with weak binding—furnished by van der more info Waals interactions—involving the molecules.