Detailed Notes on Crystal
Detailed Notes on Crystal
Blog Article
A stable is crystalline if it's got long-range order. When the positions of an atom and its neighbours are acknowledged at one level, the place of each atom is understood precisely all through the crystal. Most liquids deficiency extensive-selection buy, Whilst lots of have limited-vary order. Short variety is outlined as the first- or 2nd-closest neighbours of the atom. In several liquids the 1st-neighbour atoms are organized in a similar framework as during the corresponding sound phase.
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
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�?”
水胆水晶，包括气态，液态，固态，有时候可以同时多态并存，无色居多，个别情况下可见红色，绿色，黄色，蓝色，黑色等。
结晶�?When sea drinking water is permitted to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
The elements are located in a number of crystal packing arrangements. The most typical lattice buildings for metals are These obtained by stacking the atomic spheres into one of the most compact arrangement.
Cite Though every effort and hard work has actually been manufactured to observe citation style regulations, there might be some discrepancies. Make sure you refer to the right model guide or other resources When you have any questions. Pick Citation Model
[ C/U ] transparent glass of top of the range, normally with its surface Minimize into patterns that reflect light
Single crystals of metals are delicate and malleable, whilst polycrystalline metals are more difficult and more robust and are more helpful industrially. Most polycrystalline supplies is often designed into big single crystals soon after prolonged warmth procedure. Before blacksmiths would heat a bit of steel to really make it malleable: warmth makes a few grains develop large by incorporating smaller sized kinds. The smiths would bend the softened metal into condition and then pound it awhile; the pounding would enable it to be polycrystalline once again, increasing its toughness.
Crystals are don't just renowned for their Bodily visual appearance, but various crystals of different supplies and formations may end up in an enormous selection of employs and Bodily Attributes.
在透明的水晶中，隐裂纹呈亮晶晶的片状，有时还会有晕彩效应。这些裂纹是水晶在生长过程中，遇到外力挤压而在内部产生的一些隐形裂纹，隐裂纹在芙蓉石、紫水晶、白水晶球及白水晶柱中都很常见。有的裂纹后来被物质填充，形成愈合的裂纹，也就是原来的裂纹又长住了。这种裂纹对水晶的影响相对要小一些。
crystal Alteration is variable: absent in lots of crystals, in Other folks creating dense sericite aggregates which may show some recrystallization effects to supply coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally organized in aggregates. Within the Cambridge English Corpus In addition, haloarchaeal cells were embedded inside of salt crystals below laboratory problems and subsequently analysed by light-weight microscopy. With the Cambridge English Corpus The white clouds (typically sparse) were also greatly considered becoming composed of tiny crystals of water ice, rather like cirrus in our ambiance. Within the Cambridge English Corpus They're located in evaporite salt lakes and may be trapped in salt crystals during evaporation. With the Cambridge English Corpus Consequently, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to Demise by way of cell lysis. From your Cambridge English Corpus The crystals here had been Employed in the main or 2nd orders of reflection. With the Cambridge English Corpus Within our 8xperiments, the crystals have been cubes with a foundation area of eight e mm. Within the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : effect of temperature and pressure.