Figure 5
The intensity diffracted by a stack of purple membrane at energy E1 = 2152 eV (circles) and at E2 = 2154 eV (line) membrane and its difference I(E1) − I(E2) (triangles) as a function of scattering angle. Indices (h,k) are marked. The two-dimensional hexagonal plane group is p3 with a = 61 Å. |