New Step by Step Map For Crystal
New Step by Step Map For Crystal
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A strong is crystalline if it's prolonged-array get. Once the positions of an atom and its neighbours are recognized at one particular position, the area of each atom is known exactly throughout the crystal. Most liquids absence extended-array purchase, Even though many have shorter-range order. Quick variety is outlined as the main- or 2nd-nearest neighbours of an atom. In lots of liquids the very first-neighbour atoms are organized in the exact same structure as during the corresponding stable phase.
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
A crystal construction focuses on how the atoms are organized Within the crystal. However, crystallographers have an interest in the general shape and dimensions from the crystal along with its exterior properties. To perform this, they have to learn about the crystal technique.
If you want to see how crystals are fashioned, it is possible to perform a little job in your very own kitchen and find out the formation in the crystals arise with all your personal eyes . This may be finished by putting a small volume of desk salt into some standard tap h2o, wait 24 hrs, and you'll see great cubed formations. This happens as the water is evaporating, which triggers the atoms that make up the salt (the mineral) along with the h2o to come back nearer collectively.
Fig. 4: Making blocks with different styles and area chemistries direct the development of distinct crystal symmetries.
, has the exact same structure, but there are two decisions for selecting the holes which the atoms will occupy. The third layer can be placed over the atoms of the first layer, making an alternate layer sequence A
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：
The elements are observed in a number of crystal packing arrangements. The most common lattice structures for metals are Those people obtained by stacking the atomic spheres into by far the most compact arrangement.
本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。
Solids that have limited-vary order but absence lengthy-vary order are called amorphous. Practically any product is often manufactured amorphous by swift solidification from the melt (molten condition). This issue is unstable, plus the sound will crystallize in time. Should the timescale for crystallization is many years, then the amorphous condition appears stable.
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。
There are other minerals and molecules that can variety these crystal lattices. Snowflakes absolutely are a vintage illustration of a about symmetric and geometrically patterned framework from ice crystals, and gemstones of all varieties are usually crystals.
水玉：中国最古老的称法叫水玉，意谓似水之玉，又说是 �?千年之冰所�?�?。唐代诗人温庭筠《题李处士幽居》写道：�?水玉簪头白角巾，瑶琴寂历拂轻�?”。水玉一词最早频繁出于《山海经》：�?又东三百里，日堂庭之�?…�?多水�?”；�?丹山出焉，东南流注于洛水，其中多水玉 ”；�?逐水出焉，北流注于渭，其中多水玉 ”。司马相如《上林赋》曰�?�?水玉磊河 �?。水晶得名水玉，古人是看�?�?其莹如水，其坚如�?�?的质地。
crystal Alteration is variable: absent in several crystals, in others creating dense sericite aggregates which can display some recrystallization results to create coarser-grained white mica. In the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are sometimes organized in aggregates. From the Cambridge English Corpus On top of that, haloarchaeal cells had been embedded inside of salt crystals beneath laboratory circumstances and subsequently analysed by light-weight microscopy. From your Cambridge English Corpus The white clouds (commonly sparse) were being also widely considered to be currently being made up of small crystals of h2o ice, alternatively like cirrus within our ambiance. With the Cambridge English Corpus They can be located in evaporite salt lakes and can be trapped in salt website crystals in the course of evaporation. Within the Cambridge English Corpus Thus, the cells (organelles and membranes) are destroyed mechanically by ice crystals, resulting in death by cell lysis. From your Cambridge English Corpus The crystals were Utilized in the main or second orders of reflection. From your Cambridge English Corpus Inside our 8xperiments, the crystals ended up cubes with a foundation space of 8 e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and stress.