5 Simple Statements About Crystal Explained
5 Simple Statements About Crystal Explained
Blog Article
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。
By clicking “Take All Cookies�? you comply with the storing of cookies on your product to boost web page navigation, examine web site usage, and guide within our marketing and advertising efforts.
晶及其石英岩类玉石是中低档宝玉石，虽比不上钻石、红蓝宝石的高贵，但在加工中如果构思巧妙而且加工精细，同样具有很高的价值。如中国传统的玛瑙“虾盘”、“龙盘”、“水漫金山�?水胆玛瑙摆件)都被誉为国家级宝玉石。
水碧：《山海经》中，水晶又被称作水碧： �?又南三百里，日耿山，无草木，多水碧 �?，郭璞注�?�?亦水玉类 ”。这种称谓常被文人所引用，晋代郭景纯《璞江赋》道�?�?鬼，水碧�?�?。水晶又有人称它叫玉瑛。《符瑞图》载�?美石似玉，水精谓之玉瑛也�?”
Crystalline construction is characterised by a geometrical, repeating sample of symmetric molecular framework. The arrangement of atoms varieties these requested, repeating patterns.
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。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
26Some of the best ingesting glasses are comprised of direct crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
水晶包裹体丰富多彩，从气体、液体到各种矿物质，甚至宝石，均可被包含于水晶内，各种包裹体所形成的景象更是变化万千。按照包裹体的内容，常把包裹体水晶分为一下八类：
crystal The newly crystallized quartz grains are characterized by elongate crystals oriented oblique into the shear band margins, defining an average grain-form foliation. 来自 Cambridge English Corpus We say the chain topology during the superior w location functions because the proverbial ' scratch-on-theglass ' necessary during the organic chemistry laboratory for making crystals. 来自 Cambridge English Corpus The age scatter amongst the person crystals may perhaps mirror incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene sorts neutral to pale brown, subhedral to anhedral crystals, often containing inclusions of plagioclase microlaths and opaque phases.
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。
Crystal Lattices You will find 7 devices of crystal constructions, which can be also referred to as lattices or Room lattices:
水精：水晶为何称为水精，《广雅》有巧解：�?水之精灵�?”；李时珍则说：�?莹洁晶光，如水之精英 website ”。细加考究，此称还蕴含浓厚的宗教意味呢。水精一名，最初见于佛书，后汉支曜翻译的《具光明定意经》说：�?其所行道，色如水�?�?。
crystal Alteration is variable: absent in lots of crystals, in others manufacturing dense sericite aggregates which may exhibit some recrystallization outcomes to generate coarser-grained white mica. From your Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes arranged in aggregates. From your Cambridge English Corpus Furthermore, haloarchaeal cells had been embedded inside salt crystals below laboratory ailments and subsequently analysed by light-weight microscopy. Within the Cambridge English Corpus The white clouds (typically sparse) were being also greatly considered being composed of small crystals of water ice, alternatively like cirrus within our ambiance. With the Cambridge English Corpus They can be found in evaporite salt lakes and might be trapped in salt crystals all through evaporation. With the Cambridge English Corpus For that reason, the cells (organelles and membranes) are wrecked mechanically by ice crystals, leading to Demise as a result of cell lysis. From your Cambridge English Corpus The crystals were Employed in the initial or next orders of reflection. From your Cambridge English Corpus In our 8xperiments, the crystals had been cubes having a base spot of eight e mm. Within the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : impact of temperature and pressure.