Journal article

Publication year: 1992

Pages: 659-677

Journal: European journal of solid state and inorganic chemistry

Volume number: 29

Issue number: 4-5

ISSN: 0992-4361

Publisher: Gauthier-Villars

Abstract: 

Colourless single crystals of the hitherto unknown flourides EuSnF7 and YSnF7 (P 2(1)) have been obtained: a=605.6(1) pm, b=562.8(1) pm, c=817.5(1) pm and beta = 103.09(2)-degrees ("sealed platinum tube"; 28d; 780-degrees-C; EuF3/SnF4 with Eu:Sn=1:1).Four-circle-diffractometer Siemens AED 2, MoK(alpha)-, R=4.19% and R(W)=3.66% with 2039 of 2039 I0 (hkl) for EuSnF7 and a=595.40(9) pm, b=556.46(7) pm, c=805.7(1) pm and beta=103.32(1)-degrees(from mixtures YF3/Metallic Sn/CuF2 with Y:Sn:Cu=1:1:2). Four-circle-diffractometer SIEMENS AED 2, MoK(alpha)-, R=3.45% and R(W)=3.28% with 1476 of 1522 I0 (hkl) for YSnF7).

The monoclinic fluorides are isotypic with SmZrF7. The complex structure is built up by quadratic-antiprismatic MF8-polyhedra (M=Eu, Y) and SnF6-octahedra.

The Madelung Part of Lattice Energy, MAPLE, "Mean Fictive Ionic Radii, MEFIR", and "Effective Coordination Numbers, ECoN", as well as the Charge Distribution, CHARDI, are calculated and discussed.

Harvard Citation style: BENNER, G. and HOPPE, R. (1992) 2 NEW COMPOUNDS OF THE SMZRF7-TYPE - EUSNF7 AND YSNF7, European journal of solid state and inorganic chemistry, 29(4-5), pp. 659-677

APA Citation style: BENNER, G., & HOPPE, R. (1992). 2 NEW COMPOUNDS OF THE SMZRF7-TYPE - EUSNF7 AND YSNF7. European journal of solid state and inorganic chemistry. 29(4-5), 659-677.