Not known Details About Crystal

Not known Details About Crystal

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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。

Crystals are lovely rock formations which have amazed human beings for A large number of yrs. They can be employed for quite a few different things, not only for decoration. Most of the initial radios ever invented employed crystals to transmit the radio waves. Some devices, like quartz watches and laser crystals, use Unique properties and harmonic capabilities of crystals to help make extremely precise measurements and changes.

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。

Fig. 3: A library of lattice symmetries may be accessed by changing the particle core and DNA shell.

Fig. four: Building blocks with different designs and floor chemistries immediate the development of distinct crystal symmetries.

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�?。

根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?

The weather are discovered in a number of crystal packing arrangements. The most common lattice buildings for metals are Individuals received by stacking the atomic spheres into the most compact arrangement.

Crystals are frequently viewed as one thing of immense attractiveness, and they are commonly utilised with diamonds or other stones to make pieces of jewelry. Nearly all of crystals now are gentleman-produced in laboratories.

crystal The recently crystallized quartz grains are characterised by elongate crystals oriented oblique towards the shear band margins, defining a standard grain-form foliation. 来自 Cambridge English Corpus We say the chain topology inside the large w location functions as the proverbial ' scratch-on-theglass ' needed in the natural chemistry laboratory to produce crystals. 来自 Cambridge English Corpus The age scatter among the individual crystals may well mirror incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene sorts neutral to pale brown, subhedral to anhedral crystals, from time website to time containing inclusions of plagioclase microlaths and opaque phases.

Look through cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal crystal clear idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Check your vocabulary with our enjoyable graphic quizzes

Orthorhombic: They are rhombic prisms and dipyramids that resemble tetragons but without 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。

对于紫水晶黄水晶这样的单色水晶，通常要观察它的二色性，即使是最顶级的紫水晶黄水晶也是有色差的，通过这个方法可以鉴别是否加色。