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NanMTh6F30: A Large Family of Quaternary Thorium Fluorides

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journal contribution
posted on 31.12.2018, 00:00 by Vladislav V. Klepov, Gregory Morrison, Hans-Conrad zur Loye
Recently we reported the synthesis, crystal structures, and magnetic properties of compounds in the NanMU6F30 series, where n = 4, 3 and where M is a divalent or trivalent metal cation, respectively. In this article we advance our investigation of this structure type by expanding it to the thorium-containing compounds NanMTh6F30, where n = 3 in the case of MIII = Al, Sc, Ti, V, Cr, Fe, Ga, In, n = 4 when MII = Mg, Mn, Co, Ni, Cu, 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 = Ti3+, V3+, Cr3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+ were studied to demonstrate that the substitution of Th­(IV) for U­(IV) prevents the magnetic ions from coupling magnetically and, therefore, they exhibit simple paramagnetic behavior.