PREPARATION AND CRYSTAL-STRUCTURE OF DIAM MONIUM HEPTACHLOROPENTAOXOTRINIOBATE(V) (NH4)(2)[NB3O5CL7]

Authors
REUSCH U SCHWEDA E
Citation
U. Reusch et E. Schweda, PREPARATION AND CRYSTAL-STRUCTURE OF DIAM MONIUM HEPTACHLOROPENTAOXOTRINIOBATE(V) (NH4)(2)[NB3O5CL7], Zeitschrift fur anorganische und allgemeine Chemie, 623(5), 1997, pp. 805-809
Citations number
19
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
ISSN journal
00442313 → ACNP
Volume
623
Issue
5
Year of publication
1997
Pages
805 - 809
Database
ISI
SICI code
0044-2313(1997)623:5<805:PACODM>2.0.ZU;2-T
Abstract
Colourless sometimes pale blue crystals of (NH4)(2)[Nb3O5Cl7] are prep ared in silica tubes from a mixture of NbCl5, NH4Cl and As2O3 at 1050 K (NH4)(2)L[Nb3O5Cl7] crystallizes in space group C2/c with Z=4. The l attice constants at 293 K are a = 1680.6(8) pm, b=886.6(1) pm, c=1104. 3(5) pm and beta=111.35(2)degrees. The structure consists of layers of [(Nb3O5Cl7)(2-)](infinity)(2). Within a layer the niobium centered oc tahedra are corner sharing. The structure of the anion shows a new kin d of octahedral connectivity for a layered MX4-structure. The ammonium ions are located in between the polyanionic layers.