Journal article

Authors list: HOFMANN, R; GRUEHN, R

Publication year: 1990

Pages: 81-92

Journal: Journal of Inorganic and General Chemistry

Volume number: 590

Issue number: 11

ISSN: 0044-2313

DOI Link: https://doi.org/10.1002/zaac.19905900109

Publisher: Wiley

Abstract: 
Single crystals of LaNb5O14 could be prepared by chemical transport reactions (T2 --> T1; T2 = 1050-degrees-C; T1 = 950-degrees-C) using chlorine as transport agent. LaNb5O14 crystallizes in the orthorhombic space group Pbcm with cell dimensions a = 3.8749(2) angstrom; b = 12.4407(6) angstrom and c = 20.2051(9) angstrom; Z = 4; R = 6.28%, R(w) = 3.74%. The structure consists of two types of Nb-O-polyhedra. Especially remarkable are chains of edge-sharing pentagonal NbO7-bipyramids, which are interconnected by corner-sharing NbO6-octahedra. Tunnels running in a-direction are created by this framework of NbO6- and NbO7-polyhedra. Lanthanum atoms are located in these tunnels at levels inbetween the niobium atoms. The relationship to O-LaTa3O9 and M-CeTa3O9 type structures will be discussed.

Harvard Citation style: HOFMANN, R. and GRUEHN, R. (1990) PREPARATION AND STRUCTURE OF LANB5O14, Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry, 590(11), pp. 81-92. https://doi.org/10.1002/zaac.19905900109

APA Citation style: HOFMANN, R., & GRUEHN, R. (1990). PREPARATION AND STRUCTURE OF LANB5O14. Zeitschrift für anorganische und allgemeine Chemie = Journal of Inorganic and General Chemistry. 590(11), 81-92. https://doi.org/10.1002/zaac.19905900109