AbstractResults of high pressure fluorination (300–3000 bar F2) are given and discussed, e.g. fluorides of CrIV, MnIV, NiIV, CuIV, PtIV, PrIV, NdIV(?), DyIV(?) and RhV, AuV. Newly prepared were BaNiF6(monoclinic, a = 9.465Å, b = 4.950Å, c = 6.655Å, β = 103.3O), Cs2‐xRbxNiF6, Rb2‐xKxNiF6(K2PtCl6‐type) all carmine‐red; BaPrF6(RbPaF6‐type, a = 8.027Å, b = 11.593Å, c = 5.617Å), SrPrF6(LaF6‐type, a = 7.090Å, c = 7.290Å), both colourless powders; Cs2KNdF7(a = 9.605Å), Cs2KDyF7(a = 9.479Å), both cubic, orange‐yellow powders, (NH4)3, ZrF7‐type; MnF4(trig., a = 19.53 Å, c = 12.59 Å), ultramarine‐blue single crystals, O+2[MnF5]−(monoclinic, a = 17.55 Å, b = 8.43 Å, c = 9.10 Å, β = 101.8°), bright‐red single crystals, and yellow single crystals, O+2[AuF6]−, which dec