李商隐,杜牧,白居易,欧阳修,苏轼,呈大昌,辛弃疾,杨万里,吴文英,杨基,魏源等诗坛,词林大家都有歌吟水晶的佳篇传世。
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。
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
Fig. 7: A template-directed technique can Manage The location of building blocks with a surface from the formation of complicated constructions.
You will also find lots of elements that resemble crystals but are actually polycrystals. Polycrystals form when microscopic crystals fuse collectively to kind a solid. These elements usually do not encompass purchased lattices.
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光泽:玻璃光泽。断口处为油脂光泽。光泽,指宝石表面对光线反射的一种光学性质。观察水晶的光泽,可用手握着它,以灯光或窗户投进来的光线看表面反射,透明水晶亮度与光泽强弱有关。
Crystals could be grown beneath moderate problems from all ninety two In a natural way occurring components besides helium, and helium could be crystallized at reduced temperatures through the use of 25 atmospheres of strain.
13Nearly all pcs contain a quartz-crystal clock to control their Procedure.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。
⑤化学稳定�?非常好,在常温下仅溶解于氢氟酸,不溶解于其它各类酸、碱。在高温高压条件下可溶解于碳酸钠溶液中。
There's two this sort of probable periodic preparations. In Every single, the initial layer has the atoms packed right into a airplane-triangular lattice in which each atom has six quick neighbours. Figure 2 demonstrates this arrangement for your atoms labeled A
The sodium chloride crystal lattice is characterised by the near packing of your favourable sodium ions and negative chloride ions. Each sodium ion is surrounded by 6 chloride ions, and every chloride ion is surrounded by six sodium ions, creating a hugely secure and symmetrical composition.
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�?�?。
Binary crystals are located in several structures. Some pairs of elements variety multiple structure. At home temperature, cadmium sulfide may perhaps website crystallize both while in the zinc blende or wurtzite construction. Alumina also has two doable buildings at area temperature, α-alumina (corundum) and β-alumina. Other binary crystals show diverse buildings at distinct temperatures. One of the most elaborate crystals are those of silicon dioxide (SiO2), that has seven various buildings at a variety of temperatures and pressures; the commonest of such structures is quartz.