A Simple Key For Crystal Unveiled
A Simple Key For Crystal Unveiled
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对这类水晶晶簇观赏石的欣赏与评价，主要是强调晶体的完整、品种的名贵（如紫水晶、烟晶、发晶等）、造型奇特、含有名贵晶体（如辰砂、辉锑矿等）伴生等。晶簇产于矿床晶洞中，长相完美的并不多见，要完整无损地采集下来，又比较困难，故而采集起来代价较大，精品晶簇价值也就昂贵了。
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。
A essential strategy in crystal structures is the device mobile. It's the smallest unit of quantity that permits equivalent cells for being stacked collectively to fill all Place. By repeating the pattern with the device cell repeatedly in all directions, the complete crystal lattice may be created. A cube is The only example of a unit mobile. Two other illustrations are shown in Determine 1. The first may be the device mobile for the face-centred cubic lattice, and the 2nd is for the entire body-centred cubic lattice. These structures are described in the next paragraphs.
Fig. seven: A template-directed approach can Command the placement of creating blocks with a floor inside the development of intricate buildings.
How Crystals Variety The entire process of forming a crystal is known as crystallization. Crystallization generally occurs every time a strong crystal grows from the liquid or Answer.
⑧、雕刻：立体感强，工艺高，做工精细，成本高。分手工雕刻图形、机器雕刻文字。
Crystals glimpse exceptional from a number of other rocks and minerals, but �?barring a number of Particular situations �?nearly all minerals conceal a crystalline framework underneath the area.
1A crystal chandelier lit the space.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》
13Nearly all personal computers have a quartz-crystal clock to control their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
crystal The newly crystallized quartz grains are characterized by elongate crystals oriented oblique to the shear band margins, defining an average grain-shape foliation. 来自 Cambridge English Corpus We say the chain topology inside the higher w region functions since the proverbial ' scratch-on-theglass ' needed from the organic and natural chemistry laboratory to make crystals. 来自 Cambridge English Corpus The age scatter amid the person crystals could mirror incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene forms neutral to pale brown, subhedral to anhedral crystals, once in a while containing inclusions here of plagioclase microlaths and opaque phases.
用手去触摸水晶，天然水晶通常温度要比人造水晶的要凉的多；用眼观察，天然水晶通常有棉絮状的包裹体，这个是人造水晶所没有的。
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。
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 ”。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�?�?。
矿物成分：针铁矿、赤铁矿、金红石、磁铁矿、电气石、石榴石、云母、绿泥石等形成了包裹体水晶，如发晶、钛晶、绿幽灵等，发晶中则含有肉眼可见的似头发状的针状矿物的包裹体形成。含锰和铁者称紫水晶；含铁�?；呈金黄色或柠檬�?)称黄水晶；含锰和钛呈玫瑰色者称蔷薇石英，即粉水晶；烟色者称烟水晶；褐色者称茶晶；黑色透明者称为墨晶。