Valence tautomerism of a novel polymeric Mn(II) species (original) (raw)

Page s 250 transition metal elements TM = E8-E10. In the system Ba-Ni-Ge, two homogeneity ranges with different Ni content are structurally characterized, which are both related to the clathrate-I structure. Compounds with low Ni content, Ba 8 Ni x Ge 42±1 (0 < x ≤ 0.6), can be considered as solution of Ni in the binary Ba 8 Ge 43  3 (space group Ia-3d, a = 21.307(2) Å). The subcell with space group Pm-3n is observed for the compositions Ba 8 Ni x Ge 42±1 (0.6 < x ≤ 4.2). The change in Ni content is associated with the respective change in lattice parameters (a = 10.657(1)-10.681(1) Å), but also confirmed by microprobe analyses.