7. Interplanar spacing. Show that, for an orthogonal lattice with lattice constants $a_1$, $a_2$, $a_3$, the perpendicular distance between adjacent ($hkl$) planes is $d_{hkl} = \left[ \left( \frac{h}{a_1} \right)^2 + \left( \frac{k}{a_2} \right)^2 + \left( \frac{l}{a_3} \right)^2 \right]^{-1/2}$
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The formula for interplanar spacing in an orthogonal lattice is given by: dₙₖᵢ = 1 / √((h/a₁)² + (k/a₂)² + (l/a₃)²) where dₙₖᵢ is the interplanar spacing between adjacent (h,k) planes, and a₁, a₂, a₃ are the lattice constants along the x, y, and z directions Show more…
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Interplanar separation. Consider a plane $h k l$ in a crystal lattice. (a) Prove that the reciprocal lattice vector $\mathbf{G}=h \mathbf{b}_{1}+k \mathbf{b}_{2}+l \mathbf{b}_{3}$ is perpendicular to this plane. (b) Prove that the distance between two adjacent parallel planes of the lattice is $d(h k l)=2 \pi /|\mathbf{G}| .$ (c) Show for a simple cubic lattice that $d^{2}=a^{2} /\left(h^{2}+k^{2}+l^{2}\right)$.
Consider a plane (hkl) in a crystal lattice. (a) Prove that the reciprocal lattice vector G = hb₁ + kb₂ + lb₃ is perpendicular to this plane. (b) Prove that the distance between two adjacent parallel planes of the lattice is d(hkl) = 2π/|G|. (c) Show for a simple cubic lattice that d² = a²/(h² + k² + l²).
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