Accurate X‐ray diffraction data required for proper evaluation of bond valence sums and global instability indexes: redetermination of the crystal structures of diamond‐like Cu2CdSiS4 and Cu2HgSnS4 as a case study - Treece, Megan M.; Kelly, Jordan C.; Rosello, Kate E.; Craig, Andrew J.; Aitken, Jennifer A. (Acta Crystallographica Section C: Structural Chemistry, 2023)