New Step by Step Map For Crystal
New Step by Step Map For Crystal
Blog Article
A reliable is crystalline if it's extended-variety order. When the positions of the atom and its neighbours are recognized at one particular issue, the area of each atom is understood precisely through the entire crystal. Most liquids lack prolonged-array buy, although numerous have small-variety buy. Brief array is outlined as the 1st- or second-nearest neighbours of an atom. In several liquids the very first-neighbour atoms are arranged in the same framework as inside the corresponding stable stage.
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
人造水晶分为熔炼水晶与养殖晶：据水晶专家汪毅的阐述，随着水晶的价值提高，喜欢的人增多，水晶也引起了作伪者的兴趣，现阶段中国水晶市场常见的造假方法为：
诗中道出一段唐代由盛变衰的史实。玄宗末年，杨贵妃得宠，三姐妹并封为国夫人。他们养尊处优，奢华至极，仆人用水晶盘将珍馐佳肴端到宴席上，美人觉得没有口味，懒得动筷子。作为“诗圣”作为“史诗”，紫驼一段写饮食之精美，不空发议论，只尽情揭露事实，无一刺讥语，无一慨叹声，却使人于以外得之：此诗之善讽也。以史为鉴，这样的世道，这样的人物，国家不出“安史之乱”那样的大祸反倒不正常了。
Fig. 4: Developing blocks with distinct styles and surface area chemistries immediate the formation of distinctive crystal symmetries.
Encyclopaedia Britannica's editors oversee matter places through which they have in depth knowledge, whether or not from many years of expertise received by engaged on that material or by way of study for a complicated degree. They generate new articles and confirm and edit information received from contributors.
Include to phrase listing Incorporate to term listing [ C/U ] transparent rock that appears like ice, or simply a bit of it
发晶：无色、浅黄、浅褐等，可因含金红石常呈金黄、褐红等色，含电气石常呈灰黑色；含阳起石而呈灰绿色。
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：
多色�?无色水晶没有多色性。有色水晶有弱到强的多色�?表现为体色的不同深浅。
15The trick to a good thermoelectric substance is usually a crystal framework during which electrons can flow 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。
正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（advancement lines）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。
This Evaluate chronicles around 20 years of exploration into developing a genetic code for crystal engineering. In lieu of directing Organic processes, this code works by using artificial varieties of DNA to programme the assembly of nanoparticles more info and microparticles into 1D, 2D and 3D crystalline architectures, in which nearly each element of the resultant buildings is often systematically managed. Within just this conceptual framework, the structural and purposeful advances are described in order to determine the existing degree of sophistication and to predict long run Instructions with the System.
A further kind of crystalline carbon is predicated on a molecule with 60 carbon atoms called buckminsterfullerene (C60). The molecular form is spherical. Every single carbon is bonded to a few neighbours, as in graphite, as well as the spherical condition is realized by a mixture of 12 rings with five sides and 20 rings with 6 sides. Comparable structures were initially visualized from the American architect R. Buckminster Fuller for geodesic domes.