Tl5SnF9 und Tl5TiF9: die ersten [Tl5F3]2+-Schichten in neuartigen Thallium(I)-fluoridfluorometallaten(IV)

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“…Tl 5 SnF 9 and Tl 5 TiF 9 were shown to contain the new [Tl 5 F 3 ] 2+ sheet structure and were connected via [MF 6 ] 22 (M = Ti or Sn) octahedra to a three dimensional network; the thallium(I) ions were coordinated by eight fluorines. 123 In TlCu 5 O(VO 4 ) 3 the structure contained ladder shaped [Cu 10 O 26 ] ribbons composed of edge-and corner-sharing [CuO 5 ] polyhedra linked by vanadate groups. The thallium(I) ions filled channels running along the a axis.…”

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“…An orthorhombic-tetragonal phase transition occurs at elevated temperature. The new compounds 115 Tl 5 TiF 9 and Tl 5 SnF 9 are isostructural and contain [Tl 5 F 3 ] 2+ sheets connected into a three-dimensional network by [MF 6 ] 22 (M = Ti, Sn) octahedra. KCuM IV F 7 (M = Zr, Hf) is the formulation 116 of a new ternary fluoride structure containing Jahn-Teller distorted CuF 6 octahedra and MF 8 and KF 10 groupings.…”

From Ba3Nb2O2F12(H2O)2 to Ba0.5NbO2F2(H2O): Achieving Balanced Nonlinear Optical Performance by O/F Ratio Regulation

“…Particularly, early transition metal (ETM)-centered fluorides or oxyfluorides with second-order Jahn–Teller (SOJT) effects are inclined to realize large second-harmonic generation (SHG) responses . Usually, ETM-centered fluorides tend to form highly coordinated MF x units (M = ETM, x = 6, 7, 8), like pseudo-hexagonal-packed TiF 6 octahedra in Tl 5 TiF 9 , TaF7 monocapped trigonal prism in CsNaTaF 7 , and TaF 8 bicapped trigonal prisms in CsKTaF 7 or β-K 2 TaF 7…”