Not known Details About Crystal
Not known Details About Crystal
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27Local economists have looked into their crystal balls and witnessed something fairly awful.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
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景观水晶，就是包裹体组成各种造型特异的水晶，有的似山水，有的似人物，有些像文字，有些像动物，植物，器物等等。
Substantial crystals of diamond are important gemstones. The crystal has other appealing properties; it has the highest sound velocity of any solid and is the greatest conductor of heat. Besides diamond, the opposite common type of carbon is graphite, that is a layered substance. Each individual carbon atom has three coplanar around neighbours, forming an arrangement called the honeycomb lattice. Three-dimensional graphite crystals are attained by stacking comparable layers.
C2 [ U ] clear glass of incredibly good quality, ordinarily with its surface Slash into delicate styles:
第二种是“半包裹体”，在水晶结晶以后，由于受到地球引力的影响而产生的裂隙，晶体外的一些物质通过水晶的裂隙渗透到水晶内部，一部分包裹于水晶之中另一部分露于水晶之外。我们可以看到物质渗进水晶的裂迹，常被称为“通道”，这种包裹体所形成的景象相对地较受自然环境和时间的影响，相应的价值也比较�?。
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
To be a very hot solution cools or perhaps a saturated Resolution evaporates, particles draw shut sufficient for chemical bonds to type. Crystals might also type from deposition straight from the gas stage. Liquid crystals have particles oriented in an arranged way, like good crystals, nonetheless have the ability to circulation.
Crystals tend to be viewed as one thing of huge natural beauty, plus they are generally used with diamonds or other stones check here to create pieces of jewellery. Nearly all crystals now are male-built in laboratories.
A crystal technique refers back to the classification of crystals based on the geometric arrangement and symmetry in their lattice constructions. You can find seven principal crystal techniques:
. The second layer is shaded during the figure. It's got the identical plane-triangular construction; the atoms sit within the holes formed by the primary layer. The main layer has two equivalent sets of holes, but the atoms of the second layer can occupy just one established. The third layer, labeled C
Orthorhombic: They are rhombic prisms and dipyramids that resemble tetragons but without the need of square cross-sections.
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�?�?。
Another form of crystalline carbon relies with a molecule with 60 carbon atoms named buckminsterfullerene (C60). The molecular condition is spherical. Each and every carbon is bonded to a few neighbours, as in graphite, as well as spherical form is achieved by a mixture of twelve rings with five sides and twenty rings with six sides. Equivalent structures have been initially visualized because of the American architect R. Buckminster Fuller for geodesic domes.