Article ID Journal Published Year Pages File Type
10632756 Materials Research Bulletin 2005 5 Pages PDF
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 × 10−6, αb = 6.1 × 10−6 and αc = 7.6 × 10−6 K−1. The coefficient of volume (αV) thermal expansion was 17.3 × 10−6 K−1, which is relatively low compared to many analogues silicates.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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