Uber Hexafluorotitanate (III). Cs2MTiF6 und Rb2MTiF6 (M  K bzw. Na); mit einer Bemerkung über Tl3TiF6

On Hexafluorotitantes (III). Cs₂MTIF₄ and Rb₂MTIF₄(M?K, Na); with a Remark on TI₃TIF₆ By heating the binary fluorides in a closed system we obtained Cs₂KTiF₆ (a = 9.12₄ Å), Rb₂KTiF₆ (a = 8.93₂ Å) and Rb₂NaTiF₆ (a = 8.53₃ Å), all cubic Elpasolithes of light blue colour as well as Cs₂NaTiF₆ (hexagonal a = 6.27₂, c = 30.91 Å, isotypic with Cs₂NaCrF₆) and Tl₃TiF₆ TiF₃ (3.1–295.5°K) and Cs₂KTiF₆ (74.9–297.7°K) have been measured magnetically. The spectra of reflection in the range of 10 000 to 30 000 cm^?1 of TiF₃ and the new quaternary fluorides are similar. The Madelung Part of Lattice Energy (MAPLE) is calculated and discussed.