An X-ray diffraction study of pressure-induced phase transitions in Bi2MoO6

Synchrotron based X-ray diffraction through a diamond anvil cell was used to determine the equations of state and pressure-induced phase transitions in Bi2MoO6. It was observed that Bi2MoO6 undergoes a phase transformation at ∼6.8 GPa. The high-pressure phase can be indexed to the orthorhombic structure and the transition is reversible on decompression from ∼47 GPa. The bulk moduli of the low and high-pressure phases were calculated, while holding K′=4, to be: K=51±1 GPa and K=141.5 ±0.1 GPa, respectively.

The material Bi2MoO6 was placed inside a diamond anvil cell and then studied under high pressure at beamline X17C of the National Synchrotron Light source. X-ray diffraction data was analyzed using the Rietveld method .Figure optionsDownload as PowerPoint slideHighlights
► A high-pressure study of bismuth molybdate was performed.
► Pressure-induced phase transitions were observed.
► The low pressure phase bulk modulus was calculated to be K=51±1 GPa.
► The high pressure phase bulk modulus was calculated to be B=141.5±0.1 GPa.