Crystal Fundamentals Explained

Crystal Fundamentals Explained

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Calcite crystals will often be Employed in optical devices, and in some cases the graphite in pencil direct are sheets of crystals that fundamentally crack aside layer by layer to write. Silica can form silicate crystals which are The premise for quartz, mica, olivine, and all kinds of other crystals and minerals.

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。

晶及其石英岩类玉石是中低档宝玉石，虽比不上钻石、红蓝宝石的高贵，但在加工中如果构思巧妙而且加工精细，同样具有很高的价值。如中国传统的玛瑙“虾盘”、“龙盘”、“水漫金山�?水胆玛瑙摆件)都被誉为国家级宝玉石。

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

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。

Learn the way the shape in the crystals decide the several minerals into familiesMinerals crystallize according to considered one of seven motifs, known as crystal systems.

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。

As a hot Remedy cools or simply a saturated Option evaporates, particles draw close plenty of for chemical bonds to variety. Crystals also can form from deposition directly from the fuel phase. Liquid crystals have particles oriented within an structured manner, like good crystals, nonetheless will be able to circulation.

水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。

广义的包裹体是指宝石内部含有的与主晶宝石化学成分、物理性质等不同的物质。

15The trick to a superb thermoelectric material can be a crystal framework during which electrons can stream freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。

Crystallography is definitely the review of crystals, and it deals with every thing from best geometric styles to seemingly random conglomerations of particles and minerals.

Crystals are categorised generally speaking types, for example insulators, metals, semiconductors, and molecular solids. A single crystal of the insulator is frequently transparent get more info and resembles a piece of glass. Metals are shiny Except they've rusted. Semiconductors are occasionally shiny and sometimes transparent but are in no way rusty. Quite a few crystals could be categorized as an individual form of stable, while others have intermediate conduct. Cadmium sulfide (CdS) is usually prepared in pure kind and is a superb insulator; when impurities are additional to cadmium sulfide, it becomes a fascinating semiconductor.

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。