Journal article

Publication year: 1996

Pages: 297-307

Journal: Journal of Inorganic and General Chemistry

Volume number: 622

Issue number: 2

ISSN: 0044-2313

DOI Link: https://doi.org/10.1002/zaac.19966220216

Publisher: Wiley

Abstract: 
Colourless single crystals of Cs4K{Li[Ga2F12]} (A) and Cs4K{Li[Fe2F12]} (B) have been obtained by solid state reaction from intimate mixtures of the corresponding binary fluorides (Pt-tube, 750 degrees C, 40 d). The trigonal unit cells with (A) a = 631,3(1) pm; c = 3059,9(6) pm and (B) a = 635,0(1) pm; c = 3089,2(7) pm, respectively (Z = 3, Guinier-Simon data, Cu-K alpha(1)), are confirmed by single crystal investigations. The compounds crystalize isostructural in the space group R(3) over barm$ (No. 166). The structures were determined using four-circle diffractometer data (Siemens AED 2) with (A) R = 2.95%, 3627 I-o and (B) R = 1.86%, 4179 I-o, respectively (SHELX-76), and are characterized by triplets of facesharing octahedra parallel [00.1] with the cation-sequence M(III)-Li-M(III), six of which are connected by [KF6]-octahedra via common corners and each triplet is surrounded by six different [KF6]-octahedra. The structure is completed by Cs+ filling the cavities. The Madelung Part of Lattice Energy (MAPLE), Mean Fictive Ionic Radii (MEFIR) and Effective Coordination Numbers (ECoN) are calculated and compared. The classification as lithometallate could be verified by a new MAPLE concept. The Charge Distribution (CHARDI) was calculated and compared with the results according to 'bond length-bond strength'.

Harvard Citation style: Bork, M. and Hoppe, R. (1996) The first oligomeric anions of fluoro-litho metallates with octahedra sandwich motive: Cs4K{[F(3)M(III)F(3)]Li[F(3)M(III)F(3)]}, M(III)=Ga, Fe, Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry, 622(2), pp. 297-307. https://doi.org/10.1002/zaac.19966220216

APA Citation style: Bork, M., & Hoppe, R. (1996). The first oligomeric anions of fluoro-litho metallates with octahedra sandwich motive: Cs4K{[F(3)M(III)F(3)]Li[F(3)M(III)F(3)]}, M(III)=Ga, Fe. Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry. 622(2), 297-307. https://doi.org/10.1002/zaac.19966220216