High Pressure phase transitions in BaWO4

Details High Pressure phase transitions in BaWO4 High Pressure phase transitions in BaWO4

2003-10-10

arxiv.org/abs/cond-mat/0310236v2

Solid State Communication vol 130/3-4 pp. 203-208, 2004

Physics

Condensed Matter

Materials Science

14 pages with 4 figures and 1 table

Scientific paper

10.1016/j.ssc.2004.01.043

Using in-situ angle dispersive x-ray diffraction, we have shown that barium tungstate, which exists in scheelite phase at ambient conditions, transforms to a new phase about seven giga pascal. Analysis of our data based on Le bail refinement suggests that this phase could be fergusonite and not mercuric molybdate type, which was proposed earlier from the Raman investigations. Beyond fourteen giga pascal this compound undergoes another phase transformation to a significantly disordered structure. Both the phase transitions are found to be reversible.

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