Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2002     Display Documents



  history
ID: 7333.0, MPI für Festkörperforschung / FKF Publikationen 2002
Preparation, structure, and properties of V2GeO4F2 - Chains of VO4F2 Octahedra in the First V(III) Metallate Fluoride
Authors:Achary, S. N.; Tyagi, A. K.; Köhler, J.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Journal of Solid State Chemistry
Volume:165
Issue / Number:1
Start Page:74
End Page:78
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Powder samples of the new oxide fluoride V2GeO4F2 have been
obtained by the reaction of appropriate amounts V2O3, VF3, and
GeO2 at 700 degreesC for 18h in an argon-filled sealed platinum
tube. V2GeO4F2 crystallizes in the space group Pnma with a =
9.336(1), h=8.898 (1), and c=4.912 (1)Angstrom. The structure
has been refined from X-ray powder diffraction data using the
Rietveld method (R-int = 5.5% and RP = 9.8%). The structure of
V2GeO4F2 exhibits close packed layers of the anions with an
ordering of O and F. The characteristic building units are
discrete GeO4 tetrahedra with Ge-O distances of 1.75-1.80
Angstrom. The V are coordinated by four 0 and two F to form
VO4F2 octahedra connected via two common edges to give zigzag
chains. These chains are linked via corners to form a three-
dimensional network. The temperature dependence of the magnetic
susceptibility of V2GeO4F2 indicates antiferromagnetic
correlations. (C) 2002 Elsevier Science (USA).
Free Keywords:vanadium oxide fluoride; crystal structure; magnetic properties
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:; Max Planck Inst Festkorperforsch, Heisenbergstr 1,D-70569 Stuttgart, Germany
; Bhabha Atom Res Ctr, Div Appl Chem, Bombay 400085, Maharashtra, India
Identifiers:ISI:000175169200011
ISSN:0022-4596
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.