A Simple Key For Crystal Unveiled
A Simple Key For Crystal Unveiled
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对这类水晶晶簇观赏石的欣赏与评价，主要是强调晶体的完整、品种的名贵（如紫水晶、烟晶、发晶等）、造型奇特、含有名贵晶体（如辰砂、辉锑矿等）伴生等。晶簇产于矿床晶洞中，长相完美的并不多见，要完整无损地采集下来，又比较困难，故而采集起来代价较大，精品晶簇价值也就昂贵了。
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
A crystal construction focuses on how the atoms are organized Within the crystal. Nevertheless, crystallographers are interested in the overall condition and sizing of the crystal together with its external traits. To perform this, they should know about the crystal method.
Most sound components present in character exist in polycrystalline sort as opposed to as one crystal. They are actually made up of countless grains (modest crystals) packed together to fill all space. Just about every individual grain has another orientation than its neighbours. Although extended-assortment order exists in just one particular grain, on the boundary involving grains, the ordering adjustments direction. A standard bit of iron or copper (Cu) is polycrystalline.
C2 [ U ] transparent glass of incredibly top quality, typically with its floor Slice into fragile designs:
Lattices might have just one lattice level for every mobile or more than one, yielding a complete of fourteen Bravais crystal lattice varieties. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the three-dimensional array produced by a set of discrete factors.
水晶原石观赏石，从字面意义理解：观赏水晶石的原貌，即经过抛光去皮后的包裹体水晶和原色水晶，不需雕刻不求象形就具有非常高的观赏价值和收藏价值。此类水晶观赏石对质地要求非常之高，水晶晶体通透干净，颜色艳丽，意境鲜明深刻的价值就高，它的价值特点就好比钻石，实实在在石头本身的价值。
You will find a identical directive about crystal glass which differentiates involving complete direct crystal, lead crystal and crystal.
13Nearly all computer systems incorporate a quartz-crystal clock to regulate their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
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。
Crystals are not only renowned for their Bodily visual appeal, but distinct crystals of various products and formations can lead to a vast variety of works by using and physical Houses.
The composition with the sodium atoms on your own, or even the chlorine atoms by itself, is fcc and defines the device mobile. The sodium chloride framework Hence is manufactured up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) is based within the bcc framework; each other atom is cesium or chlorine. In this instance, the device mobile can be a cube. The 3rd essential construction for AB
crystal Alteration is variable: absent in lots of crystals, in Other people manufacturing dense sericite aggregates which can clearly show some recrystallization results to provide coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally organized in aggregates. Through the Cambridge English Corpus On top of that, haloarchaeal cells were being embedded within just salt crystals less than laboratory conditions and subsequently analysed by light microscopy. From the Cambridge English Corpus The white clouds (generally sparse) ended up also broadly considered becoming made up of little crystals of water ice, alternatively like cirrus in our ambiance. Within the Cambridge English Corpus These are found in evaporite salt lakes and can be trapped in salt crystals in the course of evaporation. From the Cambridge English Corpus Thus, the cells (organelles and membranes) are destroyed mechanically by ice crystals, resulting in death by means of mobile lysis. In the Cambridge English Corpus The crystals ended up Employed in the first or second orders of reflection. Within the Cambridge English Corpus Within our 8xperiments, the crystals were cubes that has a base space of 8 e mm. Through the Cambridge more info English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and pressure.