Crystal Can Be Fun For Anyone
Crystal Can Be Fun For Anyone
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27Local economists have seemed into their crystal balls and viewed something somewhat awful.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
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。
看做工：水晶制品加工过程分为两种，即磨工和雕工。如水晶项链、手链、耳环等属于研磨品；观音像、内画鼻烟壶等属于雕刻品。
Tetragonal: These crystals form prisms and double pyramids. The framework is sort of a cubic crystal, besides one axis is lengthier than the other.
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
They'll inevitably produce a nice very little uniform cluster of atoms, That is the process of developing crystals. The greater they might arrive alongside one another, the greater of a formation will probably be noticeable for the naked eye. Researchers can ascertain what mineral These are considering by how the crystals kind.
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
Crystals are absolutely nothing over an ordered arrangement of molecules or atoms. Crystals come in many different sizes and styles, and each one has distinctive properties. The things they are made of establishes how it is going to type.
Numerous crystals behave like butter in that they are tough at lower temperatures but delicate at increased temperatures. They may be called solids in the least temperatures under their melting point. A possible definition of a sound is really an item that retains its shape if remaining undisturbed. The pertinent challenge is how much time the article retains its form. A remarkably viscous fluid retains its shape for an hour or so but not a year. A good will have to continue to keep its condition for a longer time than that.
颜色：无色，浅至深的紫色，浅黄、中至深黄色，浅至深褐、棕色，绿至黄绿色，浅至中粉红。
16I opened the box and saw a piece of crystal snowflake in addition to a greeting card with "Content Birthday" inside the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
The sodium chloride crystal lattice is characterised with the close packing in the good sodium ions and unfavorable chloride ions. Each and every sodium ion is surrounded by 6 chloride ions, and every chloride ion is surrounded by six sodium ions, making a really stable and symmetrical composition.
The composition with the sodium atoms on your own, or perhaps the chlorine atoms alone, is fcc and defines the unit cell. The sodium chloride composition As a result is produced up of two interpenetrating fcc lattices. The cesium chloride lattice (Determine 3A) relies within the bcc construction; each and every other atom is cesium or chlorine. In this case, the unit mobile is usually a dice. The third vital composition for AB
Tetragonal �?Characterised by 3 mutually more info perpendicular axes, two of which might be equal in duration, even though the third is for a longer time or shorter and perpendicular to the opposite two.