Not known Details About Crystal
Not known Details About Crystal
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Not all crystals are equally crystalline. There are frequently impurities, plus the ionic & covalent among molecules can produce vastly various constructions out of precisely the same content. An awesome 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。
These developments incorporate unique structures with programmable lattice symmetries and well-defined crystal behaviors, responsive components that leverage the intrinsic properties of nucleic acids to govern constructions on need, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals which offer insights into light–subject interactions. Searching forward, we challenge the Local community to leverage the extraordinary structural Command afforded by crystal engineering with DNA to synthesize lessons of useful products that push past what continues to be doable with In a natural way transpiring crystalline products or These made by additional typical tactics.
Large crystals of diamond are useful gemstones. The crystal has other fascinating Attributes; it's the very best sound velocity of any reliable and is the greatest conductor of warmth. Aside from diamond, one other popular form of carbon is graphite, which can be a layered materials. Every carbon atom has three coplanar in close proximity to neighbours, forming an arrangement known as the honeycomb lattice. Three-dimensional graphite crystals are attained by stacking related layers.
25If you're a Billy Crystal fan, you are going to really like this film.如果你是比利·克里斯特尔的影迷，你就会喜欢这部电影。《柯林斯英汉双解大词典》
Not all crystals form in drinking water, but almost all crystals type the same way, atoms arrive together and become a uniformed cluster. The process may take as small as a couple of days to perhaps a thousand decades. Natural crystals that come from the Earth kind the exact same way.
30Three days went past, and I had been amazed to view it once more: all the openings ended up sewed up by thin and white thread and they looked much like the ice crystal on winter's branches during the north.
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
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颜色：无色，浅至深的紫色，浅黄、中至深黄色，浅至深褐、棕色，绿至黄绿色，浅至中粉红。
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。
There are just a few diverse unit-mobile styles, so numerous crystals share only one unit-cell type. A crucial characteristic of the unit mobile is the volume of atoms it contains. The entire amount of atoms in the entire crystal will be the range in Every single cell multiplied by the quantity of device cells. Copper and aluminum (Al) Each and every have a single atom per device cell, when zinc (Zn) and sodium chloride get more info have two. Most crystals have just a few atoms per device cell, but there are a few exceptions. Crystals of polymers, by way of example, have Countless atoms in Each individual unit mobile.
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�?�?。
对于紫水晶黄水晶这样的单色水晶，通常要观察它的二色性，即使是最顶级的紫水晶黄水晶也是有色差的，通过这个方法可以鉴别是否加色。