The 5-Second Trick For Crystal
The 5-Second Trick For Crystal
Blog Article
27Local economists have looked into their crystal balls and found one thing fairly nasty.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》
Crystals are gorgeous rock formations that have surprised individuals for 1000s of years. These are employed for quite a few various things, not just for decoration. Many of the 1st radios at any time invented utilized crystals to transmit the radio waves. Some devices, like quartz watches and laser crystals, use Particular Homes and harmonic capabilities of crystals to create extremely precise measurements and changes.
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
Fig. seven: A template-directed solution can control The location of developing blocks on a area while in the formation of sophisticated buildings.
《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。”
发晶，包括钛晶，铜顺发，绿发晶，黑发晶，银发晶，杂色发晶，其中钛晶最珍贵，少数钛晶价值可比钻石，红宝石和蓝宝石以及祖母绿。
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
Crystals are absolutely nothing much more than an ordered arrangement of molecules or atoms. Crystals are available in many alternative shapes and sizes, and each has unique characteristics. What they are created of establishes how it's going to sort.
仿制钛晶树水晶：钛晶是水晶里价格最昂贵的，造假者当然也不会放过这么好的产品。天然的环境下，在水晶里能生长个像树一样的钛晶，完全是可能的，只是这样的货很少，那我们的造假专家是如何做的呢，白水晶底下打个洞，激光打点成板状的钛晶进去，就这样这块水晶的身价就能飙升几十倍。往往有的钛晶戒面，会采用将钛晶部位割成板状，与圆面的水晶粘合的方法来制作。
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。
15The trick to a great thermoelectric product is usually a crystal framework by which electrons can stream freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
压电性：水晶晶体受到压力时会产生电荷；反之，受到电压作用时，晶体会产生频率很高的振动。水晶具有可使压力与电荷相互转移的性能，称压电性。
The C60 click here molecules, also referred to as buckyballs, are really strong and almost incompressible. Crystals are shaped this sort of that the balls are arranged within an fcc lattice having a a person-nanometre spacing involving the centres of adjacent balls. The identical C70 molecule has the shape of a rugby ball; C70 molecules also sort an fcc crystal when stacked collectively. The good fullerenes kind molecular crystals, with weak binding—provided by van der Waals interactions—in between the molecules.