8Where can we get this magic wand and crystal ball?我们到哪里获得这种魔棒和水晶玻璃球？
A essential strategy in crystal structures may be the unit cell. It is the smallest unit of volume that allows identical cells to become arranged together to occupy all available space. The geometrical foundation of all crystals could be the lattice. A lattice might be considered as an everyday and infinite arrangement of points or atoms, exactly where Each and every stage or atom has A similar encompassing ecosystem.
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。
Tetragonal: These crystals kind prisms and double pyramids. The structure is sort of a cubic crystal, except just one axis is longer than the opposite.
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
Not all crystals variety in h2o, but nearly all crystals form the exact same way, atoms come with each other and become a uniformed cluster. The process normally takes as tiny as a few days to it's possible a thousand several years. Organic crystals that originate from the Earth kind a similar way.
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：
26Some of the finest drinking Eyeglasses are constructed from lead crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
Metallic Crystals: Metals normally form metallic crystals, in which many of the valence electrons are totally free to move through the lattice. Iron, one example is, can kind distinctive metallic crystals.
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。
. The second layer is shaded in the determine. It's got exactly the same plane-triangular framework; the atoms sit during the holes formed by the primary layer. The primary layer has two equivalent sets of holes, although the atoms of the next layer can occupy only one established. The third layer, labeled C
的释�?浏览 cryptologist cryptology cryptorchidism cryptosporidium crystal crystal ball crystal clear idiom copyright crystalline #randomImageQuizHook.filename #randomImageQuizHook.isQuiz 用我们的趣味配图小测验考考你的词汇量
14For illustration, We now have Quartz crystal clocks and watches accurate to within one minute a calendar year.例如，我们使用的每年误差不超过one分钟的石英水晶钟表和手表。
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