Crystal for Dummies
Crystal for Dummies
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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
Another fun, and delicious, experiment will be to type huge crystals utilizing sugar. By heating sugar with water and then permitting this Option evaporate on sticks, it is possible to type rock candy from sugar crystals!
A essential notion in crystal buildings is the device cell. It's the smallest unit of volume that allows similar cells to get stacked with each other to fill all Area. By repeating the sample of your device cell repeatedly in all Instructions, your entire crystal lattice is usually constructed. A dice is The best example of a unit mobile. Two other illustrations are proven in Figure one. The 1st would be the device cell to get a confront-centred cubic lattice, and the second is for the system-centred cubic lattice. These buildings are explained in the subsequent paragraphs.
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 Sort The entire process of forming a crystal is named crystallization. Crystallization normally occurs every time a strong crystal grows from the liquid or Answer.
发晶，包括钛晶，铜顺发，绿发晶，黑发晶，银发晶，杂色发晶，其中钛晶最珍贵，少数钛晶价值可比钻石，红宝石和蓝宝石以及祖母绿。
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：
Crystals are nothing at all over an ordered arrangement of molecules or atoms. Crystals can be found in many different sizes and styles, and each one has distinctive qualities. What they are created of establishes how it is going to variety.
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[ C/U ] clear glass of high quality, commonly with its floor Slice into patterns that reflect gentle
Through the Cambridge English Corpus We say the chain topology from the superior w location acts as the proverbial ' scratch-on-theglass ' desired during the natural chemistry laboratory to create crystals. In the Cambridge English Corpus Continual-tension and temperature molecular-dynamics simulations of crystals of the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From the Cambridge English Corpus Besides these, dust particles have already been noticed in very low-temperature plasmas, like These used in plasma processing and plasma crystals. Within the Cambridge English Corpus The final Element of the guide focuses on peculiarities of strongly coupled dusty plasmas, including the formation of dust crystals and involved eye-catching forces. Within the Cambridge English Corpus Total characterization of harm threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. Through the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, Principal morphologies were not noticed. Within the Cambridge English Corpus See all examples of crystal These illustrations are from corpora and from resources on the web. Any thoughts within the examples never signify the impression of the Cambridge Dictionary editors or of Cambridge College Push or its licensors.
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
Crystals are labeled usually types, for instance insulators, metals, semiconductors, and molecular solids. Just one crystal of an insulator is often clear and resembles a bit of glass. Metals are shiny Until they've got rusted. Semiconductors are occasionally shiny and in some cases clear but are hardly ever rusty. Lots of crystals could be categorized as only one kind of solid, while others have intermediate conduct. Cadmium sulfide (CdS) is usually prepared in pure sort and is an excellent insulator; when impurities are added to cadmium sulfide, it results in being an interesting semiconductor.
Good Vocabulary: similar terms and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology gold check here dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See extra results » You may as well obtain related words, phrases, and synonyms while in the topics: