TY - JOUR
T1 - Structure, crystal chemistry and thermal evolution of the δ-Bi2O3-related phase Bi9ReO17
AU - Sharma, Neeraj
AU - Withers, Ray L.
AU - Knight, Kevin S.
AU - Ling, Chris D.
PY - 2009/9
Y1 - 2009/9
N2 - The thermal evolution and structural properties of fluorite-related δ-Bi2O3-type Bi9ReO17 were studied with variable temperature neutron powder diffraction, synchrotron X-ray powder diffraction and electron diffraction. The thermodynamically stable room-temperature crystal structure is monoclinic P21/c, a=9.89917(5), b=19.70356(10), c=11.61597(6) Å, β=125.302(2)° (Rp=3.51%, wRp=3.60%) and features clusters of ReO4 tetrahedra embedded in a distorted Bi-O fluorite-like network. This phase is stable up to 725 °C whereupon it transforms to a disordered δ-Bi2O3-like phase, which was modeled with δ-Bi2O3 in cubic Fm3̄m with a=5.7809(1) Å (Rp=2.49%, wRp=2.44%) at 750 °C. Quenching from above 725 °C leads to a different phase, the structure of which has not been solved but appears on the basis of spectroscopic evidence to contain both ReO4 tetrahedra and ReO6 octahedra. Crown
AB - The thermal evolution and structural properties of fluorite-related δ-Bi2O3-type Bi9ReO17 were studied with variable temperature neutron powder diffraction, synchrotron X-ray powder diffraction and electron diffraction. The thermodynamically stable room-temperature crystal structure is monoclinic P21/c, a=9.89917(5), b=19.70356(10), c=11.61597(6) Å, β=125.302(2)° (Rp=3.51%, wRp=3.60%) and features clusters of ReO4 tetrahedra embedded in a distorted Bi-O fluorite-like network. This phase is stable up to 725 °C whereupon it transforms to a disordered δ-Bi2O3-like phase, which was modeled with δ-Bi2O3 in cubic Fm3̄m with a=5.7809(1) Å (Rp=2.49%, wRp=2.44%) at 750 °C. Quenching from above 725 °C leads to a different phase, the structure of which has not been solved but appears on the basis of spectroscopic evidence to contain both ReO4 tetrahedra and ReO6 octahedra. Crown
KW - Bismuth rhenium oxide
KW - Delta-BiO
KW - Neutron powder diffraction
KW - Phase transition
KW - Rietveld-refinement
KW - Synchrotron X-ray powder diffraction
UR - http://www.scopus.com/inward/record.url?scp=69249203527&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2009.07.008
DO - 10.1016/j.jssc.2009.07.008
M3 - Article
SN - 0022-4596
VL - 182
SP - 2468
EP - 2474
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 9
ER -