SODIUM OXONITRIDOMETALLATES(VI) OF MOLYBDENUM AND TUNGSTEN, NA4MO2N2 (M = MO, W)

Authors
OSTERMANN D JACOBS H HARBRECHT B
Citation
D. Ostermann et al., SODIUM OXONITRIDOMETALLATES(VI) OF MOLYBDENUM AND TUNGSTEN, NA4MO2N2 (M = MO, W), Zeitschrift fur anorganische und allgemeine Chemie, 619(7), 1993, pp. 1277-1282
Citations number
17
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
ISSN journal
00442313 → ACNP
Volume
619
Issue
7
Year of publication
1993
Pages
1277 - 1282
Database
ISI
SICI code
0044-2313(1993)619:7<1277:SOOMAT>2.0.ZU;2-4
Abstract
MoO3 as well as WO3 react with an excess of NaNH2 in autoclaves at tem peratures ranging from 250-degrees-C to 750-degrees-C to yield - in co ntrast to Ta2O5 [1] -oxonitridometallates of general composition Na4MX 4 and other products like Na5WO4N [2]. The compounds decompose in mois t air within minutes to Na2WO4, Na2MoO4 and Na2MoO4 . xH2O, respective ly. The structures of the Na4MX4 phases were determined from single cr ystal X-ray diffraction data. They crystallize triclinic in the Na4CoO 4-type structure [3] P1BAR, Z = 2 with the following cell constants: [ GR