Alkali-metal fluoroarsenates(III) revisited; the As4F13– anion, the crystal structure of CsAs4F13 and Raman spectra of MAs4F13 (M = Cs, Rb)

Alkali-metal tridecafluorotetraarsenates(III), CsAs4F13 and RbAs4F13 were synthesized by the reaction of CsF and RbF with liquid AsF3 at 353 K.