A reliable is crystalline if it's lengthy-range buy. Once the positions of an atom and its neighbours are identified at 1 level, the location of each and every atom is thought exactly through the entire crystal. Most liquids absence very long-selection buy, Whilst many have limited-assortment get. Short selection is described as the first- or next-nearest neighbours of an atom. In several liquids the very first-neighbour atoms are organized in precisely the same framework as in the corresponding reliable period.
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
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。
Increase to term record Increase to word listing C2 [ U ] transparent glass of quite top quality, commonly with its surface Lower into fragile styles
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 shape of your crystals establish the various minerals into familiesMinerals crystallize Based on considered one of seven motifs, often called crystal programs.
30Three days went earlier, and I used to be amazed to check out it all over again: every one of the openings had been sewed up by thin and white thread plus they seemed such as ice crystal on winter's branches during the north.
Hexagonal �?Characterised by four axes, 3 of which happen to be equal in size and intersect at one hundred twenty levels, with a fourth axis perpendicular to the opposite three.
Q.four. What's the distinction between atomic click here framework and crystal construction? Ans. The primary difference between atomic construction and crystal structure lies within their definitions: atomic structure refers to how atoms are arranged in just a one molecule or possibly a cluster of molecules, whereas crystal composition problems the specific arrangement of atoms inside of a sound compound.
Crystals with apparent flat faces are called euhedral crystals, though People missing defined faces are named anhedral crystals. Crystals consisting of ordered arrays of atoms that are not usually periodic are termed quasicrystals.
15The trick to an excellent thermoelectric product is a crystal composition where electrons can move 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。
国家还并未给天然水晶提供一个等级划分的具体标准，水晶品种繁杂，每一品种都有他不同的评判标准。
Crystals are categorised normally groups, such as insulators, metals, semiconductors, and molecular solids. One crystal of an insulator is usually clear and resembles a piece of glass. Metals are shiny Unless of course they've rusted. Semiconductors are sometimes shiny and occasionally transparent but are under no circumstances rusty. Many crystals may be categorized as an individual form of reliable, while others have intermediate conduct. Cadmium sulfide (CdS) could be geared up in pure type and is an excellent insulator; when impurities are additional to cadmium sulfide, it turns into a fascinating semiconductor.
⑥白色的包裹体有蚀变的绿泥石、云母、愈合裂隙、水晶、方解石、透闪石等。