Detailed Notes on Crystal

Detailed Notes on 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。

Bismuth (Bi) appears for being a metallic, but the number of electrons available for electrical conduction is similar to that of semiconductors. The truth is, bismuth is known as a semimetal. Molecular solids are frequently crystals fashioned from molecules or polymers. They may be insulating, semiconducting, or metallic, based on the type of molecules while in the crystal. New molecules are continuously getting synthesized, and plenty of are created into crystals. The number of distinct crystals is big.

看做工：水晶制品加工过程分为两种，即磨工和雕工。如水晶项链、手链、耳环等属于研磨品；观音像、内画鼻烟壶等属于雕刻品。

看原料：选料精良的水晶制品，应看不到胶口及棉絮；质地纯净、光润、晶莹为好。

这种水晶观赏石特指水晶晶簇，它是众多单晶体集中生长在一起的晶体组合。晶簇以其晶莹剔透、独特造型而享誉水晶赏石界。

无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。

解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。

Ionic Crystals: Electrostatic forces kind ionic bonds. A basic instance is actually a halite or salt crystal.

Crystals will often be viewed as one thing of enormous splendor, and they are commonly applied with diamonds or other stones to produce pieces of jewellery. Many crystals now are man-manufactured in laboratories.

[ C/U ] transparent glass of top of the range, generally with its area Reduce into designs that mirror light-weight

The fundamental units of solids are both atoms or atoms which have blended into molecules. The electrons of an atom shift in orbits that type a shell structure round the nucleus. The shells are crammed in a scientific order, with Each individual shell accommodating only a small number of electrons. Distinctive atoms have various quantities of electrons, that are dispersed inside a characteristic Digital composition of stuffed and partially read more loaded shells.

There are actually only a few various unit-mobile shapes, so numerous crystals share one device-cell style. A very important characteristic of a unit mobile is the volume of atoms it contains. The overall amount of atoms in your complete crystal is the selection in each cell multiplied by the volume of device cells. Copper and aluminum (Al) Each and every have one atom for every unit cell, even though zinc (Zn) and sodium chloride have two. Most crystals have only some atoms per unit cell, but there are some exceptions. Crystals of polymers, such as, have 1000s of atoms in Each individual unit cell.

⑦双色水晶：一种紫色和黄色共存一体的水晶，紫色、黄色之间界限较明显，分别占据晶块的一部分。

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。