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Interplanar Spacing: Calculating Distance between (200) Planes
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[QUOTE="TSny, post: 4503875, member: 229090"] From your expression for [B]b[SUB]1[/SUB][/B], it appears that you are working with a face-centered-cubic lattice (in real space) and that you have chosen reciprocal lattice vectors that are reciprocal to a set of[I] primitive lattice vectors[/I] corresponding to a [I]primitive cell[/I]. However, for fcc and bcc lattices the miller indices are often chosen to correspond to a [I]conventional cell[/I]. For information on primitive and conventional cells: [url]http://www-personal.umich.edu/~sunkai/teaching/Winter_2013/third_lecture.pdf[/url] The unprimed vectors ([B]a[SUB]1[/SUB][/B], [B]a[SUB]2[/SUB][/B], [B]a[SUB]3[/SUB][/B]) in the diagram that I attached show lattice vectors in real space that correspond to a primitive cell of the lattice. The primed vectors correspond to a conventional cell. So, the Miller indices (2, 0, 0) probably correspond to the conventional cell. If so and you want to use d=2[itex]\pi[/itex]/lGl, you will need to find the reciprocal vector [B]b'[SUB]1[/SUB][/B] that is reciprocal to the conventional cell lattice vectors ([B]a'[SUB]1[/SUB][/B], [B]a'[SUB]2[/SUB][/B], [B]a'[SUB]3[/SUB][/B]). [/QUOTE]
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Interplanar Spacing: Calculating Distance between (200) Planes
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