Detailed Notes on Crystal
Detailed Notes on Crystal
Blog Article
李商隐，杜牧，白居易，欧阳修，苏轼，呈大昌，辛弃疾，杨万里，吴文英，杨基，魏源等诗坛，词林大家都有歌吟水晶的佳篇传世。
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。
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
③次生包裹体：指主体水晶形成后，由于环境的变化使得主晶周围的一些物质沿裂隙进入到其内部而形成的包裹体。形成的原因有出熔作用、裂隙的结晶化、以及放射性元素破坏的作用等。水晶典型的次生包裹体有胶花水晶中的氧化铁充填物等。
2She was donning a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
Encyclopaedia Britannica's editors oversee matter parts in which they've comprehensive expertise, no matter if from decades of encounter received by focusing on that content or by way of study for an advanced degree. They create new information and verify and edit content material received from contributors.
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
The elements are located in a number of crystal packing arrangements. The most typical lattice structures for metals are These attained by stacking the atomic spheres into quite possibly the most compact arrangement.
A lot of crystals behave like butter in that they're tough at low temperatures but gentle at bigger temperatures. They are called solids in the slightest degree temperatures down below their melting issue. A achievable definition of the good can be an item that retains its condition if remaining undisturbed. The pertinent situation is just how long the item keeps its shape. A remarkably viscous fluid retains its form for an hour although not a yr. A solid need to retain its condition more 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。
say cheese a thing that somebody that is getting a photograph of you tells you to mention so that more info the mouth would make The form of a smile
的释�?浏览 cryptologist cryptology cryptorchidism cryptosporidium crystal crystal ball crystal very clear idiom copyright crystalline #randomImageQuizHook.filename #randomImageQuizHook.isQuiz 用我们的趣味配图小测验考考你的词汇量
/message /verifyErrors The term in the instance sentence will not match the entry word. The sentence consists of offensive information. Cancel Post Thanks! Your feed-back are going to be reviewed. #verifyErrors message
An additional kind of crystalline carbon is based on a molecule with sixty carbon atoms called buckminsterfullerene (C60). The molecular form is spherical. Just about every carbon is bonded to 3 neighbours, as in graphite, and the spherical shape is reached by a mixture of 12 rings with five sides and 20 rings with six sides. Comparable constructions have been initially visualized because of the American architect R. Buckminster Fuller for geodesic domes.