The Definitive Guide to Crystal
The Definitive Guide to Crystal
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27Local economists have looked into their crystal balls and noticed anything somewhat awful.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
23Sometimes, on the other hand, the crystal kind of the silicate inclusions is observed to resemble a lot more carefully the internal structure of diamond than that of other silicate minerals.然而，有时观察到硅酸盐包裹体的晶体形态比其他硅酸盐矿物更接近金刚石的内部结构。
A crystal framework focuses on how the atoms are organized inside the crystal. On the other hand, crystallographers are interested in the overall shape and sizing with the crystal and its external attributes. To perform this, they have to know about the crystal program.
Add to word record Add to word record C2 [ U ] clear glass of very premium quality, typically with its surface area Minimize into delicate patterns
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
Learn the way The form of your crystals identify different minerals into familiesMinerals crystallize Based on considered one of seven motifs, referred to as crystal methods.
时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：
②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
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被主体水晶所捕获的包裹体。原生包裹体通常为固相，形态较规则。水晶中典型的原成包裹体有金红石、电气石、黄铁矿等，也会见到岩石碎屑或集合体。
Orthorhombic: These are typically rhombic prisms and dipyramids that resemble tetragons but with out square cross-sections.
Crystals are classified usually categories, for example insulators, metals, semiconductors, and molecular solids. An individual crystal of an insulator is frequently clear and resembles a bit of glass. Metals are shiny Until they have got rusted. Semiconductors are occasionally shiny and in some cases transparent but check here are under no circumstances rusty. Numerous crystals is often categorized as only one sort of stable, while some have intermediate conduct. Cadmium sulfide (CdS) is often ready in pure type and is an excellent insulator; when impurities are added to cadmium sulfide, it becomes a fascinating semiconductor.
Binary crystals are present in quite a few structures. Some pairs of elements sort more than one framework. At home temperature, cadmium sulfide may perhaps crystallize both within the zinc blende or wurtzite structure. Alumina also has two probable buildings at area temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit different constructions at different temperatures. One of the most intricate crystals are All those of silicon dioxide (SiO2), which has 7 various structures at different temperatures and pressures; the most typical of those constructions is quartz.