Top Guidelines Of Crystal
Top Guidelines Of Crystal
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其它描述：《庶物异名疏》中说： �?水精出大秦国，一名黎�?�?。结晶完整的水晶晶体，就如参差交错的马齿，所以人们又叫它马牙石。先民们最早用它研磨成眼镜片，因而送它一个眼镜石的绰号。水晶有通称，也有俗称。广州一带称水晶叫晶玉，又名鱼脑冻；江苏东海县山民发现水晶会 �?窜火�?�?，于是给它起个放光石的俗名。世间一物多名，不足为奇，而像水晶拥有这么多的别称，实不多见。瞧，从水玉、水碧、白玉、玉瑛、水精石英、黎难、晶玉到菩萨石、马牙石、眼镜石、放光石、千年冰、高山冻、鱼脑冻等等，简直构成一部奇石鉴赏史。
⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体，这些包裹体的存在，影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质，与水晶整体不协调，被视为水晶的杂质，有这种杂质的水晶是次品。
10This could be the silicon chip—a little chip of silicon crystal.这是硅芯片——一个硅晶体的小芯片。
Most strong resources present in mother nature exist in polycrystalline form rather then as an individual crystal. They are actually composed of millions of grains (modest crystals) packed together to fill all space. Each and every specific grain has a distinct orientation than its neighbours. Whilst prolonged-vary get exists in a person grain, on the boundary in between grains, the buying adjustments course. An average bit of iron or copper (Cu) is polycrystalline.
2She was sporting a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
Monoclinic �?Characterized by 3 unequal axes, two of which intersect at an oblique angle, whilst the third is perpendicular to the plane of the opposite two.
Crystals glance one of a kind from a number of other rocks and minerals, but �?barring a few Specific scenarios �?almost all minerals disguise a crystalline structure underneath the area.
The weather are observed in a number of crystal packing preparations. The most typical lattice structures for metals are People received by stacking the atomic spheres into one of the most compact arrangement.
Among the many binary crystals, the simplest structures to visualize are People with equal figures of the two kinds of atoms. The structure of sodium chloride is predicated on a cube. To construct the lattice, the sodium and chlorine atoms are put on alternate corners of a cube, along with the structure is recurring (Determine 3B).
晶体 Silicon crystals developed inside of a laboratory transform mild into electrical Electricity. 在实验室中长成的硅晶体可将光线转变为电能。
The fundamental units of solids are possibly atoms or atoms that have combined into molecules. The electrons of an atom shift in orbits that sort a shell framework throughout the nucleus. The shells are loaded in a scientific purchase, with Each individual shell accommodating only a little number of electrons. Diverse atoms have distinct figures of electrons, which happen to be dispersed in a very characteristic Digital composition of filled and partially filled shells.
Fig. 1: Schematic of crystal formation from setting up blocks composed of a particle Main along with a shell of DNA ligands hooked up to your particle floor.
Crystals are classified on the whole types, for instance insulators, metals, semiconductors, and molecular solids. Only one crystal of the insulator is frequently transparent and resembles a piece of glass. Metals are shiny Until they have got rusted. Semiconductors are occasionally shiny and sometimes transparent but are by no means rusty. Quite a few crystals might be categorised as only one form of sound, while some have intermediate behaviour. Cadmium sulfide (CdS) is usually organized in pure type and is a superb insulator; when impurities are additional to cadmium sulfide, it gets a more info fascinating semiconductor.
The C60 molecules, also referred to as buckyballs, are fairly strong and almost incompressible. Crystals are shaped this kind of the balls are organized in an fcc lattice having a one-nanometre spacing among the centres of adjacent balls. The very similar C70 molecule has The form of a rugby ball; C70 molecules also sort an fcc crystal when stacked jointly. The good fullerenes variety molecular crystals, with weak binding—provided by van der Waals interactions—among the molecules.