Synthese,Struktur und magnetische Eigenschaften der Verbindungen NaMIIZr2F11 (MII = Ti,V und Cu) und einem Anhang über NaPdZr2F11

Synthesis, Structure, and Magnetic Properties of Compounds NaM^IIZr₂F₁₁ (M^II = Ti, V, Cu) and a Notice on NaPdZr₂F₁₁ 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 (No. 12) with a = 918.0/911.5 pm, b = 682.6/675.7 pm, c = 780.8/776.6 pm, β = 116.2/116.2º and Z = 2. Colourless NaCuZr₂F₁₁ however crystallizes as a result of the Jahn-Teller distortion of Cu²⁺ triclinic (space group P1 –C (No. 2), a = 552.7 pm, b = 568.2 pm, c = 768.0 pm, α = 111.0º, β = 97.4º, γ = 106.4º) and is – as expected – isotypic to NaAgZr₂F₁₁ 1].