Synthesis and Characterization of Manganese Tetrafluoride β‐MnF₄

Abstract

The crystal structure of β-MnF 4 has finally been elucidated. It crystallizes in the non-centrosymmetric space group R3c, no. 161, hR360, with the lattice parameters a = 19.390(3), c = 12.940(3) Å, V = 4213.3(14) Å 3 , Z = 72, T = 100 K. It is a 4a ϫ 4a superstructure of the VF 3 (FeF 3) structure type. The Mn atoms are coordinated octahedron-like by F atoms, of which two are bound terminal, while the other act as μ-bridging F atoms to other Mn atoms forming a threedimensional infinite network structure which can be described by the Niggli formula 3 ϱ [MnF 4/2 F 2/1 ]. Voids on the metal sites, which are oc

The Crucial Role of Sb2F10 in the Chemical Synthesis of F2

“…The above results and the previous literature data [13–18] demonstrate that free, solid MnF 4 and MnF 3 do not decompose spontaneously at room temperature to a lower oxidation state manganese fluoride and fluorine, Eqs. (4) and (5).…”

The Crystal Structure of MnF3 Revisited

“…We synthesized MnF 3 by compressing MnF 4 , on which we will report in the near future, [8] inside a platinum capsule using a multi-anvil press (for details see Experimental Section). Likely, MnF 4 decomposed thermally [9] to MnF 3 due to the reaction temperature of 500°C and the released fluorine reacted with the capsule.…”

Syntheses and Characterization of the Mixed-Valent Manganese(II/III) Fluorides Mn2F5 and Mn3F8

“…161) with Z = 72. 18 Besides these di-, tri-, and tetravalent fluorides, the mixedvalent manganese(II/III) fluoride Mn 2 F 5 (CCDC 2089883) was suggested to form during the partial decomposition of MnF 3 19 and was later obtained as a powder by Tressaud and Dance in 1974 by heating a mixture of MnF 2 and MnF 3 in a gold ampule up to 300 °C. 20 The lattice parameters were reported as a = 15.44 ± 0.02 Å, b = 7.27 ± 0.01 Å, c = 6.17 ± 0.01 Å, and V ≈ 693 Å 3 in the orthorhombic crystal system, and the authors suspected that the structure should be related to MnCrF 5 and those of other transition-metal fluorides of the composition ABF 5 with A and B being divalent and trivalent transition metals, respectively.…”