5 Simple Techniques For Crystal
5 Simple Techniques For Crystal
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Calcite crystals are frequently used in optical machines, and perhaps the graphite in pencil guide are sheets of crystals that effectively break apart layer by layer to write. Silica can variety silicate crystals which happen to be The idea for quartz, mica, olivine, and all kinds of other crystals and minerals.
Bismuth (Bi) seems to get a metallic, but the quantity of electrons available for electrical conduction is analogous to that of semiconductors. In reality, bismuth is named a semimetal. Molecular solids usually are crystals shaped from molecules or polymers. They are often insulating, semiconducting, or metallic, based on the style of molecules during the crystal. New molecules are repeatedly currently being synthesized, and many are made into crystals. The amount of distinctive crystals is gigantic.
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。
The purchased internal composition of huge crystals, much like the fluorite and quartz shown here, is mirrored inside their geometric styles.
看抛光：抛光的好坏直接影响到水晶制品的身价。抛光分为软抛光与硬抛光。
Lattices can have just one lattice level for each cell or more than website one, yielding a total of 14 Bravais crystal lattice varieties. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the 3-dimensional array produced by a list of discrete factors.
光泽：玻璃光泽。断口处为油脂光泽。光泽，指宝石表面对光线反射的一种光学性质。观察水晶的光泽，可用手握着它，以灯光或窗户投进来的光线看表面反射，透明水晶亮度与光泽强弱有关。
Hexagonal �?Characterised by 4 axes, three of which can be equivalent in size and intersect at a hundred and twenty degrees, having a fourth axis perpendicular to the opposite 3.
13Nearly all pcs consist of a quartz-crystal clock to control 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。
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。
Search cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal crystal clear idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Exam your vocabulary with our entertaining picture quizzes
Orthorhombic: They are rhombic prisms and dipyramids that resemble tetragons but with no sq. cross-sections.
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。
The C60 molecules, also called buckyballs, are fairly solid and Just about incompressible. Crystals are formed these types of that the balls are organized in an fcc lattice by using a one-nanometre spacing among the centres of adjacent balls. The equivalent C70 molecule has the shape of a rugby ball; C70 molecules also form an fcc crystal when stacked with each other. The reliable fullerenes type molecular crystals, with weak binding—supplied by van der Waals interactions—concerning the molecules.