Crystal for Dummies
Crystal for Dummies
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天然的水晶一般都会有絮状（绵绺），也就是大家俗称的瑕疵，这是液体水落石出和二氧化碳的小孔穴，而人工合成的水晶就不会有这样的特征。
12He tried yet again in numerous other metropolitan areas and succeeded with Crystal Caramels.他又在其他几个城市再次尝试，并成功制出了水晶焦糖。
发晶的价值取决于发的颜色、罕见性及大小，一般是发色鲜艳、块度大的价格高。水胆水晶的价值主要取决于水胆及晶体的大小、透明度的高低。如果水胆较大并有一定形态，便可加工成较为珍贵的工艺品。另外水胆中的水也有一定的科学研究价值，通过它们可了解几百万年前地球上水的成分及变化。
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。
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
30Three times went earlier, and I used to be amazed to find out it all over again: all the openings were sewed up by slender and white thread and so they appeared just like the ice crystal on Winter season's branches in the north.
Ionic Crystals: Electrostatic forces type ionic bonds. A common case in point is often a halite or salt crystal.
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Crystals with obvious flat faces are called euhedral crystals, though Those people lacking defined faces are identified as anhedral crystals. Crystals consisting of purchased arrays of atoms that are not always periodic are termed quasicrystals.
There's two such doable periodic preparations. In Every, the initial layer has the atoms packed into a plane-triangular lattice in which each atom has six rapid neighbours. Figure 2 reveals this arrangement for the atoms labeled A
Fig. one: Schematic of crystal development from more info setting up blocks made up of a particle Main and a shell of DNA ligands connected for the particle surface area.
14For illustration, We've got Quartz crystal clocks and watches correct to inside of one minute a 12 months.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
Fig. 5: The ability to recognize described crystal practices is dependent on the symmetry engineering tactic.