The smart Trick of Crystal That No One is Discussing
The smart Trick of Crystal That No One is Discussing
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27Local economists have seemed into their crystal balls and witnessed one thing fairly unpleasant.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》
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结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
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 Form The entire process of forming a crystal is known as crystallization. Crystallization frequently takes place whenever a sound crystal grows from the liquid or Remedy.
当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。
Crystals appear special from a number of other rocks and minerals, but �?barring a few Particular cases �?almost all minerals hide a crystalline structure beneath the area.
Crystals may be developed beneath average circumstances from all ninety two By natural means developing features other than helium, and helium might be crystallized at low temperatures by making use of 25 atmospheres of pressure.
Q.4. What is the difference between atomic structure and crystal structure? Ans. The key difference between atomic framework and crystal composition lies inside their definitions: atomic framework refers to how atoms are arranged inside a solitary molecule or even a cluster of molecules, Whilst crystal framework considerations the precise arrangement of atoms within a solid substance.
幽灵水晶，分绿幽灵，红幽灵，白幽灵等，主要组成为绿泥石，其中绿幽灵属于珍贵品种。
Within read more the Cambridge English Corpus We are saying the chain topology while in the significant w area acts as the proverbial ' scratch-on-theglass ' required inside the organic chemistry laboratory to make crystals. From the Cambridge English Corpus Continual-stress and temperature molecular-dynamics simulations of crystals of the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. Through the Cambridge English Corpus Along with these, dust particles have already been noticed in minimal-temperature plasmas, like those Utilized in plasma processing and plasma crystals. Within the Cambridge English Corpus The final A part of the reserve focuses on peculiarities of strongly coupled dusty plasmas, like the formation of dust crystals and associated interesting forces. Through the Cambridge English Corpus Full characterization of injury threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Within the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or even more irregular, Major morphologies weren't noticed. In the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from resources on the net. Any opinions while in the illustrations usually do not depict the belief from the Cambridge Dictionary editors or of Cambridge University Press 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。
⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。
Binary crystals are present in several constructions. Some pairs of elements variety more than one composition. At home temperature, cadmium sulfide may crystallize either inside the zinc blende or wurtzite composition. Alumina also has two possible buildings at room temperature, α-alumina (corundum) and β-alumina. Other binary crystals show distinct structures at diverse temperatures. One of the most sophisticated crystals are Individuals of silicon dioxide (SiO2), which has 7 different constructions at different temperatures and pressures; the most common of those constructions is quartz.