Triple (h,k,l) of integers identifying a lattice plane with intercepts (a/h, b/k, c/l). Associated plane spacing 1/d² = h²/a² + k²/b² + l²/c² (orthorhombic); generalises via metric tensor. Labels XRD reflections.
Triple (h,k,l) of integers identifying a lattice plane with intercepts (a/h, b/k, c/l). Associated plane spacing 1/d² = h²/a² + k²/b² + l²/c² (orthorhombic); generalises via metric tensor. Labels XRD reflections.