Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10632756 | Materials Research Bulletin | 2005 | 5 Pages |
Abstract
A new compound V2GeO4F2 was earlier found to exist in the V2O3-VF3-GeO2 system and the structure elucidation revealed it to be iso-structural to the mineral topaz. Herein, we report the lattice thermal expansion data of this compound. The lattice thermal expansion of V2GeO4F2 was studied in the temperature range of 298-873 K under a flowing helium atmosphere by the high temperature XRD (HTXRD). The coefficients of axial thermal expansions of V2GeO4F2 were found to be as: αa = 3.5 Ã 10â6, αb = 6.1 Ã 10â6 and αc = 7.6 Ã 10â6 Kâ1. The coefficient of volume (αV) thermal expansion was 17.3 Ã 10â6 Kâ1, which is relatively low compared to many analogues silicates.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S.N. Achary, A.K. Tyagi, J. Köhler,