Synthesis, structure, and magnetic properties of compounds NaMIIZr2F11 (MII = Ti, V, Cu) and a notice on NaPdZr2F11

Article abstract of DOI:10.1002/zaac.19966220714

By synthesizing NaTiZr₂F₁₁ in form of red single crystals, it was possible to obtain a complex fluoride with Ti²⁺ for the first time. It crystallizes like the analogous greenish blue vanadium compound isotypic to AgPdZr₂F₁₁ [1] monoclinic, spacegroup C2/m-C_2h³ (No. 12) with a = 918.0/911.5 pm, b = 682.6/675.7 pm, c = 780.8/776.6 pm, β = 116.2/116.2° and Z = 2. Colourless NaCuZr₂F₁₁ however crystallizes as a result of the Jahn-Teller distortion of Cu²⁺ triclinic (space group P1-C_i¹ (No. 2), a = 552.7 pm, b = 568.2 pm, c = 768.0 pm, α = 111.0°, β = 97.4°, γ = 106.4°) and is - as expected - isotypic to NaAgZr₂F₁₁ [1]. Johann Ambrosius Earth 1996.