密勒指数(Miller indices)是一种特殊的，以结晶学单胞三条棱为坐标系时确定的指数。
用X射线和光学方法测定了各个显露面，确定其密勒指数。
The orientations of all developing facets in the crystals and their Miller indices have been determined by means of X-ray and optical method.
选择这样几组晶面，使它们的密勒指数较低且具有对称性。
Those crystal planes should be selected such that their Miller indices are lower and the planes have high symmetry.
采用晶格变换的方法证明了在底心单斜格子中密勒指数与晶面间距的关系式。
In this paper, a method of lattice transformation is introduced to demonstrate the relational expression between Miller indices and interplanar spacing in base-centered monoclinic lattice.
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