Synthesis and structural characterisation of transition metal fluoride sulfates

Abstract

Eleven first row transition metal fluoride sulfates synthesised in hydrofluorothermal conditions have been structurally characterised by single crystal X-ray diffraction and exhibit a wide variety of structural motifs. The polyionic structures containing Ti, V, Mn and Fe vary from discrete polyhedral units in Na₄TiF₄(SO₄)₂ and [N₂C₁₀H₁₂] TiF₄SO₄, through one dimensional chains in (K₂FeF₃SO₄, Li₃FeF₂(SO₄)₂·H₂O, Li_1.87Ti_1.13O_0.39F_1.61(SO₄)₂, [N₂C₁₀H₁₂]TiF₂(SO₄)₂, [N₂C₆H₁₆]Fe(SO₄)₂F and [N₂C₆H₁₆]V(SO₄)₂F), and to two dimensional layers in ([N₂C₆H₁₆]²⁺Mn₂F₂(SO₄)₂, Na₂VF₃SO₄ and Na₃CrF₂(SO₄)₂).