As discussed previously , the diagonal terms constitute solute-solute scattering I uu (q), which will not be addressed further in this work, and solvent-solvent scattering, I vv (q). The off-diagonal, or "cross" terms constitute the scattering terms from the solute-solvent correlations, I uv (q) + I vu (q) = I c (q). These terms are sometimes also called "solvent cage" scattering, which is misleading, as the total scattering signal from the solvent cage also includes scattering from solvent-solvent correlations in e.g. a denser solvent shell around a solute. This part of the "cage" is encoded in the solventsolvent term, I vv (q) = I v (q). In addition, the solvent-solvent term includes the bulk signal (which resembles the signal from a neat liquid), as well as the solvent-solvent interactions across the solute, which will constitute a 'hole' in the solvent, which we will return to in the second part of this work.