5 Simple Techniques For Crystal
5 Simple Techniques For Crystal
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看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
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。
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
看原料：选料精良的水晶制品，应看不到胶口及棉絮；质地纯净、光润、晶莹为好。
Crystalline structure is characterised by a geometric, repeating sample of symmetric molecular construction. The arrangement of atoms sorts these purchased, repeating styles.
These examples are from corpora and from sources on the net. Any thoughts during the examples do not depict the opinion from the Cambridge Dictionary editors or of Cambridge College Push or its licensors.
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。
1A crystal chandelier lit the space.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》
Numerous crystals behave like butter in that they're challenging at lower temperatures but gentle at better temperatures. They may be referred to as solids at all temperatures underneath their melting point. A possible definition of a good can be an object that retains its form if remaining undisturbed. The pertinent problem is just how long the item retains its shape. A really viscous fluid retains its shape for an hour but not a year. A sound have to keep its shape more time than that.
晶体 Silicon crystals grown in the laboratory convert gentle into electrical Vitality. 在实验室中长成的硅晶体可将光线转变为电能。
⑥、丝印：水晶表面附有不同的色料进行效果处理，颜色层面较厚，着力后方可脱落。
Orthorhombic: These are rhombic prisms and get more info dipyramids that resemble tetragons but without square cross-sections.
水玉：中国最古老的称法叫水玉，意谓似水之玉，又说是 �?千年之冰所�?�?。唐代诗人温庭筠《题李处士幽居》写道：�?水玉簪头白角巾，瑶琴寂历拂轻�?”。水玉一词最早频繁出于《山海经》：�?又东三百里，日堂庭之�?…�?多水�?”；�?丹山出焉，东南流注于洛水，其中多水玉 ”；�?逐水出焉，北流注于渭，其中多水玉 ”。司马相如《上林赋》曰�?�?水玉磊河 �?。水晶得名水玉，古人是看�?�?其莹如水，其坚如�?�?的质地。
The C60 molecules, also referred to as buckyballs, are quite solid and almost incompressible. Crystals are formed these which the balls are organized in an fcc lattice that has a 1-nanometre spacing amongst the centres of adjacent balls. The similar C70 molecule has the shape of a rugby ball; C70 molecules also form an fcc crystal when stacked together. The stable fullerenes sort molecular crystals, with weak binding—provided by van der Waals interactions—involving the molecules.