The Basic Principles Of Crystal
The Basic Principles Of Crystal
Blog Article
诗中“胜美玉”，“过冰清”，写出水晶的质地美，而“亦欲应时明”则描绘出水晶充满灵性的动态美，耐人寻味。罗维是有独特眼光，懂得水晶真谛，第一个称赞水晶超过美玉的伟大诗人。他的认识已被千年之后的科学理论所证实；以水晶为直接吟咏对象的诗篇还有：
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。
Increase to phrase record Increase to word list C2 [ U ] transparent glass of very superior quality, generally with its surface Slash into fragile patterns
C2 [ U ] clear glass of pretty premium quality, generally with its floor Slice into fragile styles:
Learn the way The form on the crystals figure out different minerals into familiesMinerals crystallize In accordance with one of 7 motifs, often known as crystal methods.
Springer Mother nature continues to be neutral with regards to jurisdictional claims in revealed maps and institutional affiliations.
Hexagonal �?Characterised by 4 axes, a few of which are equivalent in duration and intersect at a hundred and twenty degrees, that has a fourth axis perpendicular to another 3.
A lot of crystals behave like butter in that they are tricky at small temperatures but tender at increased temperatures. They may be known as solids in any respect temperatures under their melting level. A possible definition of a stable is an item that retains its shape if still left more info undisturbed. The pertinent situation is just how long the article retains its form. A really viscous fluid retains its shape for one hour although not a yr. A stable must continue to keep its shape more time than that.
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。
Look through cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal crystal clear idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Check your vocabulary with our entertaining graphic quizzes
You will discover other minerals and molecules that could form these crystal lattices. Snowflakes are a basic illustration of a about symmetric and geometrically patterned framework from ice crystals, and gemstones of all versions are typically crystals.
《古今小说·李公子救蛇获称心》：“器皿皆是玻璃、水晶、琥珀、玛瑙为之，曲尽巧妙，非人间所有。”
The C60 molecules, also called buckyballs, are very robust and almost incompressible. Crystals are formed these that the balls are arranged within an fcc lattice that has a a person-nanometre spacing in between the centres of adjacent balls. The equivalent C70 molecule has the shape of a rugby ball; C70 molecules also type an fcc crystal when stacked collectively. The stable fullerenes variety molecular crystals, with weak binding—provided by van der Waals interactions—among the molecules.