Figure 3
(a) Schematic representation of the angles γ, δ, 2θ and χ, subtended by the incoming beam wavevector k and a generic scattering wavevector k′ and (b) diagram showing the offsets Δx and Δz from the detector center of a generic (i, j) pixel. The vector d (where |d| is the distance of the pixel from the diffractometer center) subtends the angles δp and γp. |