Detailed Notes on Crystal

Detailed Notes on Crystal

Blog Article

27Local economists have looked into their crystal balls and found a thing alternatively horrible.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》

By clicking “Settle for All Cookies�? you agree to the storing of cookies on the unit to boost web site navigation, assess web site utilization, and support inside our promoting initiatives.

These advancements include exotic structures with programmable lattice symmetries and perfectly-described crystal practices, responsive components that leverage the intrinsic properties of nucleic acids to govern structures on desire, nanoparticle superlattices developed epitaxially from surfaces and colloidal crystals which provide insights into light-weight–make any difference interactions. Looking forward, we problem the Local community to leverage the remarkable structural Manage afforded by crystal engineering with DNA to synthesize courses of functional supplies that thrust outside of what has actually been possible with Normally happening crystalline components or These produced by extra conventional approaches.

Fig. seven: A template-directed method can Management the placement of constructing blocks on the surface area in the development of intricate structures.

You can find a number of crystals depending on geometric structures, crystal growth, and content. There might be preparations of hexagonal carbon atoms or amethyst which makes hexagonal pyramid constructions.

Learn how The form on the crystals identify the various minerals into familiesMinerals crystallize In line with among 7 motifs, generally known as crystal units.

时尚的收藏爱好者喜欢收藏天然水晶，却常常因为在市场上面对大量的合成水晶看走了眼。市面上的水晶：

1A crystal chandelier lit the place.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》

本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。

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 more info something which somebody that is taking a photograph of you tells you to state so that the mouth can make the shape of a smile

正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（expansion strains）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。

玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。

矿物成分：针铁矿、赤铁矿、金红石、磁铁矿、电气石、石榴石、云母、绿泥石等形成了包裹体水晶，如发晶、钛晶、绿幽灵等，发晶中则含有肉眼可见的似头发状的针状矿物的包裹体形成。含锰和铁者称紫水晶；含铁�?；呈金黄色或柠檬�?)称黄水晶；含锰和钛呈玫瑰色者称蔷薇石英，即粉水晶；烟色者称烟水晶；褐色者称茶晶；黑色透明者称为墨晶。