SYNTHESIS AND STRUCTURE OF NA5SR[NBAS4] AND K5BA[NBAS4]

Authors
VIDYASAGAR K HONLE W VONSCHNERING HG
Citation
K. Vidyasagar et al., SYNTHESIS AND STRUCTURE OF NA5SR[NBAS4] AND K5BA[NBAS4], Journal of alloys and compounds, 236(1-2), 1996, pp. 38-41
Citations number
21
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
236
Issue
1-2
Year of publication
1996
Pages
38 - 41
Database
ISI
SICI code
0925-8388(1996)236:1-2<38:SASONA>2.0.ZU;2-A
Abstract
The two novel tetraarsaniobates(V) Na5Sr[NbAs4] and K5Ba[NbAs4] have b een synthesized from the powders of As, Nb and binary arsenides Na3As, K3As, SrAs or BaAs in sealed niobium ampoules and characterized by si ngle crystal X-ray crystallography. The compounds crystallize in the h P22 type of Na-6[ZnO4] (space group P6(3)mc (No. 186); Na5Sr[NbAs4], a = 955.7(1) pm, c = 751.7(2) pm; K5Ba[NbAs4], a = 1039.6(2) pm, c = 80 9.7(3) pm; Z = 2). The bond lengths d(Nb-As) in the [NbAs4](7-) anions range from 248.0(4) to 248.8(1) pm and from 249.2(3) to 250.3(1) pm i n Na5Sr[NbAs4] and K5Ba[NbAs4] respectively.