Radial Distribution Functions (RDF)

Element-Pair RDFs

Full RDF

Pair Distribution Function G(r)

The reduced PDF G(r) = 4πrρ₀(g(r) − 1) combines partial RDFs with radiation-dependent Faber–Ziman weights, so the curve depends on the probe and follows −4πrρ₀ below the closest approach.

Al₂Lu ⟨b⟩ = 32.3333, w(Al-Al) = 0.0718, w(Al-Lu) = 0.3924, w(Lu-Lu) = 0.5358 | Pd ⟨b⟩ = 46, w(Pd-Pd) = 1 | Bi₂Zr₂O₈ ⟨b⟩ = 25.8333, w(Bi-Bi) = 0.2867, w(Bi-O) = 0.2211, w(Bi-Zr) = 0.2764, w(O-O) = 0.0426, w(O-Zr) = 0.1066, w(Zr-Zr) = 0.0666

Negative Scattering Length: NiH

Switching from X-ray to neutron flips the Ni–H correlation because H has negative b_coh, while the Ni–Ni shell stays positive.

Complex: Bi₂Zr₂O₈

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Amorphous Structure

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