Not known Details About Crystal
Not known Details About Crystal
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A strong is crystalline if it has lengthy-selection buy. After the positions of the atom and its neighbours are recognized at one level, the spot of each atom is understood exactly through the entire crystal. Most liquids lack extended-array order, Despite the fact that several have brief-array order. Limited assortment is defined as the main- or second-closest neighbours of the atom. In several liquids the first-neighbour atoms are arranged in a similar framework as from the corresponding solid section.
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
景观水晶，就是包裹体组成各种造型特异的水晶，有的似山水，有的似人物，有些像文字，有些像动物，植物，器物等等。
Fig. seven: A template-directed tactic can Management The position of setting up blocks on the surface during the development of sophisticated buildings.
根据美国已经了解的情况，统计局的专家和其他人口统计学家在他们的视野中提供了一个不可抗拒的水晶球。
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水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
To be a sizzling Answer cools or maybe a saturated Remedy evaporates, particles attract close more than enough for chemical bonds to variety. Crystals might also kind from deposition directly from the fuel period. Liquid crystals have particles oriented within an organized way, like strong crystals, but can easily circulation.
One of the binary crystals, the best structures to visualize are All those with equivalent quantities of the two sorts of atoms. The composition of sodium chloride relies over a dice. To assemble the lattice, the sodium and chlorine atoms are put on alternate corners of the dice, as well as composition is recurring (Determine 3B).
A crystal program refers to the classification of crystals depending on the geometric arrangement and symmetry of their lattice structures. You will discover seven most important crystal units:
Through the Cambridge English Corpus We are saying the chain topology within the high w location functions since the proverbial ' scratch-on-theglass ' wanted while in the natural and organic chemistry laboratory to produce crystals. From the Cambridge English Corpus Constant-strain and temperature molecular-dynamics simulations of crystals of your lecithin fragments Crystal - glycerylphosphorylcholine and dilauroylglycerol. Within the Cambridge English Corpus In combination with these, dust particles are observed in small-temperature plasmas, like People Employed in plasma processing and plasma crystals. In the Cambridge English Corpus The ultimate part of the reserve concentrates on peculiarities of strongly coupled dusty plasmas, such as the development of dust crystals and involved interesting forces. From the Cambridge English Corpus Finish characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. With the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, primary morphologies were not noticed. Through the Cambridge English Corpus See all samples of crystal These examples are from corpora and from resources on the internet. Any views in the examples tend not to depict the viewpoint of the Cambridge Dictionary editors or of Cambridge University Push or its licensors.
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 categorized in general groups, such as insulators, metals, semiconductors, and molecular solids. An individual crystal of an insulator is often clear and resembles a bit of glass. Metals are shiny unless they have got rusted. Semiconductors are occasionally shiny and from time to time clear but are never rusty. Numerous crystals is usually categorized as just one form of stable, while some have intermediate conduct. Cadmium sulfide (CdS) might be geared up in pure kind and is a superb insulator; when impurities are additional to cadmium sulfide, it will become an interesting semiconductor.
Binary crystals are present in a lot of structures. Some pairs of aspects kind more than one framework. At area temperature, cadmium sulfide may perhaps crystallize possibly from the zinc blende or wurtzite structure. Alumina also has two doable structures at space temperature, α-alumina (corundum) and β-alumina. Other binary crystals show unique constructions at different temperatures. Among the many most intricate crystals are Individuals of silicon dioxide (SiO2), which has seven diverse structures at several temperatures and pressures; the most typical of such constructions is quartz.