Not known Factual Statements About Crystal
Not known Factual Statements About Crystal
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Not all crystals are equally crystalline. There are sometimes impurities, as well as ionic & covalent between molecules can create vastly unique constructions outside of the same material. An incredible example of this are diamonds and graphene.
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。
水碧：《山海经》中，水晶又被称作水碧： �?又南三百里，日耿山，无草木，多水碧 �?，郭璞注�?�?亦水玉类 ”。这种称谓常被文人所引用，晋代郭景纯《璞江赋》道�?�?鬼，水碧�?�?。水晶又有人称它叫玉瑛。《符瑞图》载�?美石似玉，水精谓之玉瑛也�?”
Crystalline framework is characterized by a geometrical, repeating pattern of symmetric molecular construction. The arrangement of atoms sorts these ordered, repeating patterns.
, has the exact same composition, but there are two alternatives for selecting the holes that the atoms will occupy. The third layer may be placed over the atoms of the main layer, making an alternate layer sequence A
时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：
As being a sizzling Answer cools or maybe a saturated Alternative evaporates, particles draw near more than enough for chemical bonds to variety. Crystals may variety from deposition directly from the gas stage. Liquid crystals have particles oriented in an structured method, like stable crystals, however will be able to circulation.
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Crystals with noticeable flat faces are referred to as euhedral crystals, when Individuals missing defined faces are identified as anhedral crystals. Crystals consisting of ordered arrays of atoms that aren't constantly periodic are termed quasicrystals.
天然性是水晶观赏石的基本特性。通常整体造型水晶矿物不饰雕琢就具备很高的观赏价值，但是包裹体水晶观赏石经常需要适当打磨抛光，这样更方便观赏水晶内部的包裹体。
The sodium chloride crystal lattice is characterized by the near packing of your favourable sodium ions and get more info destructive chloride ions. Every sodium ion is surrounded by six chloride ions, and each chloride ion is surrounded by 6 sodium ions, developing a extremely stable and symmetrical composition.
水精：水晶为何称为水精，《广雅》有巧解：�?水之精灵�?”；李时珍则说：�?莹洁晶光，如水之精英 ”。细加考究，此称还蕴含浓厚的宗教意味呢。水精一名，最初见于佛书，后汉支曜翻译的《具光明定意经》说：�?其所行道，色如水�?�?。
Tetragonal �?Characterised by a few mutually perpendicular axes, two of which can be equivalent in length, although the third is for a longer period or shorter and perpendicular to the other two.