The Basic Principles Of Crystal
The Basic Principles Of Crystal
Blog Article
A reliable is crystalline if it's got extensive-range purchase. Once the positions of an atom and its neighbours are known at a single position, the place of each and every atom is known specifically throughout the crystal. Most liquids lack long-assortment order, Despite the fact that a lot of have short-assortment order. Short vary is defined as the primary- or second-closest neighbours of the atom. In many liquids the primary-neighbour atoms are arranged in precisely the same framework as inside the corresponding good period.
12He tried using again in several other towns and succeeded with Crystal Caramels.他又在其他几个城市再次尝试,并成功制出了水晶焦糖。
景观水晶,就是包裹体组成各种造型特异的水晶,有的似山水,有的似人物,有些像文字,有些像动物,植物,器物等等。
诗中道出一段唐代由盛变衰的史实。玄宗末年,杨贵妃得宠,三姐妹并封为国夫人。他们养尊处优,奢华至极,仆人用水晶盘将珍馐佳肴端到宴席上,美人觉得没有口味,懒得动筷子。作为“诗圣”作为“史诗”,紫驼一段写饮食之精美,不空发议论,只尽情揭露事实,无一刺讥语,无一慨叹声,却使人于以外得之:此诗之善讽也。以史为鉴,这样的世道,这样的人物,国家不出“安史之乱”那样的大祸反倒不正常了。
C2 [ U ] transparent glass of extremely superior quality, normally with its surface Minimize into delicate patterns:
, has a similar structure, but There's two alternatives for selecting the holes which the atoms will occupy. The third layer could be put in excess of the atoms of the primary layer, producing an alternate layer sequence A
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。
11I carefully opened the package deal and found a crystal bell within.我小心地打开包裹,发现里面有一个水晶钟。
Q.4. What is the difference between atomic structure and crystal construction? Ans. The first distinction between atomic construction and crystal construction lies of their definitions: atomic composition refers to how atoms are organized inside of a one molecule or simply a cluster of molecules, Whilst here crystal construction considerations the specific arrangement of atoms inside of a stable compound.
[ C/U ] clear glass of top quality, ordinarily with its surface Slash into patterns that reflect mild
There are 2 this kind of probable periodic arrangements. In Each individual, the 1st layer has the atoms packed into a airplane-triangular lattice in which each atom has 6 quick neighbours. Figure two shows this arrangement for that atoms labeled A
正常的水晶在生长时,多可以发现和柱形尖端棱线平行的生长纹(progress lines)。由于在地底、岩洞中的生长空间多狭窄,尤其在遇到地震时,或地壳变动时,甚至容易遭到其他矿石的挤压,常常会压迫产生不同的「晶面」。还有,当水晶还是在液态状的时候,常常也会包覆着其他的矿石、泥灰一起结晶成长,如金红石(稍后变成发晶)、火山泥灰(稍后变成幻影水晶)等等。所有的这些,都是「自然的一部分」,请不要视为「瑕疵」。
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。
crystal Alteration is variable: absent in many crystals, in Other individuals generating dense sericite aggregates which may clearly show some recrystallization results to provide coarser-grained white mica. With the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally arranged in aggregates. From the Cambridge English Corpus In addition, haloarchaeal cells were being embedded within salt crystals less than laboratory problems and subsequently analysed by light microscopy. In the Cambridge English Corpus The white clouds (generally sparse) were also broadly regarded as currently being made up of small crystals of water ice, relatively like cirrus in our ambiance. Through the Cambridge English Corpus They're present in evaporite salt lakes and can be trapped in salt crystals all through evaporation. With the Cambridge English Corpus Therefore, the cells (organelles and membranes) are destroyed mechanically by ice crystals, leading to Demise through cell lysis. Through the Cambridge English Corpus The crystals were Utilized in the initial or next orders of reflection. In the Cambridge English Corpus In our 8xperiments, the crystals were cubes by using a foundation space of eight e mm. In the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : result of temperature and strain.