Barium

Ba 3d5/2 Values

Barium Metal 780.1 +/- 0.7 eV, 4 citations
BaO 779.6 +/-0.3 eV, 5 citations
BaSO4 780.5 +/ 0.4, 4 citations
BaS 779.8 eV, 1 citation

From work in this laboratory:
BaTiO3 780.4 eV
BaSO4 (vacuum fractured) 780.5 +/-0.1 eV, 4 analyses