LIBA4[MO2N7] AND LIBA4[W2N7] - NEW NITRID OMOLYBDATES TUNGSTATES(VI) WITH DIMERIC TETRAHEDRAL ANIONS/

Authors
HOHN P KNIEP R MAIER J
Citation
P. Hohn et al., LIBA4[MO2N7] AND LIBA4[W2N7] - NEW NITRID OMOLYBDATES TUNGSTATES(VI) WITH DIMERIC TETRAHEDRAL ANIONS/, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 49(1), 1994, pp. 5-8
Citations number
10
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
49
Issue
1
Year of publication
1994
Pages
5 - 8
Database
ISI
SICI code
0932-0776(1994)49:1<5:LAL-NN>2.0.ZU;2-H
Abstract
Black crystals of the isotypic phases LiBa4[Mo2N7] and LiBa4[W2N7] (mo noclinic, P2/n; a = 1552.2(3)/1555.2(4), b = 642.2(1)/644.4(1), c = 10 39.9(2)/1042.4(2) pm; beta = 99.23(2)/99.30(3)degrees; Z = 4) were gro wn from the melt (Li, Ba3N2, Mo/W; molar ratio 20:5:1; T-max = 1323 K; reaction with N-2, 1 atm, 18 h) by cooling (20 K/h). The crystal stru ctures contain two independent dimeric units [Mo2N7](9-)/[W2N7](9-) (s taggered conformation; Mo/W-N-Mo/W: 173.6/173.7 degrees and 180 degree s/180 degrees; Mo/W-N-(term): 180(2)-185(1)/181(3)-185(1) pm; Mo/W-N-( bridge): 195(1)/194(1) pm and 193(1)/194(1) pm).