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A New Allotropic Form of Bi2O3

Published online by Cambridge University Press:  16 February 2011

N. Kumada
Affiliation:
Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511Japan, [email protected]
N. Kinomura
Affiliation:
Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400-8511Japan, [email protected]
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Abstract

Single crystals of a new allotropic form of bismuth sesquioxide, Bi2O3 were prepared by low temperature hydrothermal reaction using hydrated sodium bismuth oxide, NaBiO3·nH2O, as a starting material. This bismuth oxide crystallized in the orthorhombic space group Pccn with a=12.732(2), b=4.955(2) and c=5.582(2)Å, z=4, and the R-factors were R=0.030 and Rw=0.030 for 1702 unique reflections. The crystal structure is built up by corner- and edge-sharing of irregular BiO5 polyhedra and the tunnel is running along the c-axis.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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