Über neue Verbindungen Cs2NaMF6 und K2NaMF6 sowie über Cs2KMnF6

Newly prepared are the cubic derivatives of the perovskite type of structure: K₂NaInF₆ (a = 8.56₀ Å), K₂NaTlF₆ (8.66₈), K₂NaScF₆ (8.48₂), K₂NaYF₆ (8.71₁), Cs₂NaInF₆ (8.90₅), Cs₂NaTiF₆ (8.99₅), Cs₂NaScF₆ (8.85₃), all colourless, as well as K₂NaCuF₆ (8.20₃ Å, green) and Cs₂KMnF₆ (tetragonal, a = 8.93₃; c = 9.26₅ Å, violett). K₂NaCuF₆ μ = 2.8₇ μ_B, θ = ?17°] and Cs₂KMnF₆ ;μ = 4.8₈ μ_B, θ = ?5°] obey the Curie-Weiss law. The volume chemistry of the compounds is discussed in detail.