Figure 3.
2D map classifying chemical bonding in solids
The map is spanned by the number of electrons shared between adjacent atoms and the electron transfer renormalized by the formal oxidation state. Different colors characterize different material properties and have been related to different types of bonds. Adapted from.29,30,31 Filled and open symbols represent thermodynamically stable and metastable phases. The red – black line describes the transition from ideal covalent bonds to perfect ionic bonds. The dashed green line indicates metavalently bonded solids with perfect octahedral arrangement like cubic Sb, AgSbTe2 and PbS, while distorted octahedrally coordinated structures are situated above it, characterized by a larger number of electrons shared. Map adapted from.32