Journal article
Authors list: Kammerer, H; Hofmann, R; Gruehn, R
Publication year: 1998
Pages: 1533-1537
Journal: Journal of Inorganic and General Chemistry
Volume number: 624
Issue number: 9
ISSN: 0044-2313
Publisher: Wiley
Abstract:
By chemical vapor transport (T-2-->T-1, T-2 = 950 degrees C, T-1 = 900 degrees C, 3 d) of a mixture of PrOCl and Nb2O5 (1:1) using 5 mg NH4Cl as transport agent we obtained the new compound Pr2Nb11O30 The crystal structure determination [a = 6.2325(5) Angstrom, c = 32.3677(36) Angstrom, Z = 2, 1631 independent I-0, 69 parameters, RI = 2.07%] shows CN = 8 (two-ford capped octahedrally) for Pr, CN = 7 (pentagonal bipyramidally) for Nb(1,2) and CN = 6 (octahedrally) for Nb(3). The structure is closely related to that of Cu5Ta11O30.
Citation Styles
Keywords
BRONZES; chemical transport; ELECTRONMICROSCOPIC INVESTIGATIONS; Jahnberg structures; LA; Pr2Nb11O30; rare-earth compounds