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Define the interplanar spacing in miller indices.
Interplanar spacing d in a cubic lattice
Interplanar spacing into a cubic crystal is specified by
d = a/(√(h2 + k2 + l2))
Here, d = inter-planar spacing in between planes along with Miller indices h, k and l.
a = lattice constant (edging of the cube).
h, k, l = Miller indices of cubic planes being taken.
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