Crystal Fundamentals Explained

Crystal Fundamentals Explained

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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。

无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。

天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。

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。

How Crystals Kind The whole process of forming a crystal is referred to as crystallization. Crystallization normally happens each time a stable crystal grows from a liquid or Option.

Lattices could have one particular lattice level for every mobile or more than one, yielding a complete of fourteen Bravais crystal lattice kinds. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the 3-dimensional array produced by a list of discrete details.

30Three days went past, and I had been shocked to discover it once more: the many openings ended up sewed up by slender and white thread and they seemed such as ice crystal on Winter season's branches during the north.

Hexagonal �?Characterised by 4 axes, 3 of which happen to be equal in length and intersect at one hundred twenty levels, which has a fourth axis perpendicular to the other 3.

第三种是“皮景”，因某些其他的矿物与水晶体共生，或由于其他的物质侵蚀而依附于水晶表面，或者是水晶受自然环境的影响，在水晶表面出现蚀象，形成了一些景象或图案，这种景观存在于水晶表面。

看文化：水晶里面的包裹体象形，能与文化、宗教及历史有所牵连的话，价格往往会比水晶本身的价值高出几倍甚至几百倍。

地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。

Orthorhombic: These are generally rhombic prisms and dipyramids that resemble tetragons but with no sq. cross-sections.

压电性：水晶晶体受到压力时会产生电荷；反之，受到电压作用时，晶体会产生频率很高的振动。水晶具有可使压力与电荷相互转移的性能，称压电性。

This crystal composition click here is answerable for the distinctive physical and chemical Attributes of sodium chloride, which include its substantial melting point, electrical conductivity, and ability to variety ionic bonds quickly.