There is a direct relation between the color of ideal crystals (including sapphire) and the varieties and contents of the trace transition metal ions occupying their lattice.

理想晶体(包括蓝宝石)的颜色与占据其晶格的微量过渡金属元素的种类及含量有直接的关系。

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The errors of lattice constant of compound are able to achieve 10-4, which basically meets the demand for measuring precision in displacive phase transition.

对该化合物晶格常数的测量误差可以达到10-4，基本上满足了对一般位移型相变测量要求的精度。

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Then we investigate the phase transition of Bose-Einstein condensation in optical lattice.

接下来我们讨论了光格子中玻色-爱因斯坦凝聚的相变问题。

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