Powder X-ray diffraction data for the new polymorphic compound ω- Bi 2 O 3

A Bi 2 O 3 compound which is unknown to date has been synthesized at 800 °C on a BeO substrate. α- Bi 2 O 3 at 800 °C undergoes a phase transition to a metastable new compound named ω- Bi 2 O 3 which in turn transforms to stable δ- Bi 2 O 3 at 900 °C. X-ray powder diffraction data were collected, indexed, and refined in order to obtain a unit cell (probable space group P 1¯: a =7.2688(4), b =8.6390(6), c =11.9698(8) Å, α=87.713(6), β=93.227(6), γ =86.653(4)°. This compound is of interest for the thick films circuits and sensors technology.