期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 25, 期 47, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/47/475402
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资金
- Spanish Consolider Ingenio 2010 Program [CSD2007-00045]
- Brazilian Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [201050/2012-9]
- Spanish MICINN [MAT2010-21270-C04-01/03/04]
- Spanish MINECO [CTQ2012-36253-C03-02]
An experimental and theoretical study of the structural properties of monoclinic bismuth oxide (alpha-(BiO3)-O-2) under high pressures is here reported. Both synthetic and mineral bismite powder samples have been compressed up to 45 GPa and their equations of state have been determined with angle-dispersive x-ray diffraction measurements. Experimental results have been also compared with theoretical calculations which suggest the possibility of several phase transitions below 10 GPa. However, experiments reveal only a pressure-induced amorphization between 15 and 25 GPa, depending on sample quality and deviatoric stresses. The amorphous phase has been followed up to 45 GPa and its nature discussed.
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