The first rubidium rare-earth(III) thiophosphates: Rb3M3[PS4]4 (M=Pr, Er)

Section of a ∞2{[M3[PS4]4]3-} layer in the new thiophosphates Rb3M3[PS4]4 (M=Pr, Er) emphasizing [MS8]13− polyhedra, [PS4]3− tetrahedra and Rb+ cations within the cavities.