Na n MTh 6 F 30 : A Large Family of Quaternary Thorium Fluorides
Recently we reported the synthesis, crystal structures and magnetic properties of compounds in the Na n MU 6 F 30 series, where n = 4 or 3, and where M is a divalent or trivalent metal cation, respectively. Here in this article we advance our investigation of this structure type by expanding it to the thorium containing compounds Na n MTh 6 F 30 , where n = 3 in the case of M III = Al, Sc, Ti, V, Cr, Fe, Ga, or In; n = 4 when MII = Mg, Mn, Co, Ni, Cu, or Zn; and n varies from 3.87 to 4.39 when the M site is partially occupied by a trivalent rare earth element. Magnetic properties of the compounds containing magnetic ions M = Ti 3+ , V 3+ , Cr 3+ , Mn 2+ , Fe 3+ , Co 2+ , Ni 2+ , and Cu 2+ were studied to demonstrate that the substitution of Th(IV) for U(IV) prevents the magnetic ions from coupling magnetically and, therefore, exhibit simple paramagnetic behavior.