Résumé
In view of increasing the energy density of battery systems for e.g. electric vehicles by lowering the dead weight penalty associated with the heavy polyanions replacing oxygen in traditional electrode materials, the title phases are prepared by ball milling of dehydrated α‐VOSO
4
and A
2
SO
4
in stoichiometric proportions followed by annealing under Ar (400—415 °C, 12 h).