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2004
Bismuth
I 5400
46- 023
Some Structural and Photophysical Properties of Two Functional Double Oxides
Bi2MTaO7 (M: Ga and In). — The title compounds are synthesized by solid state
reaction of stoichiometric amounts of Bi2O2(CO3), M2O3 (M: Ga, In), and Ta2O5
(1323—1353 K, 30 h). As revealed by powder XRD, Bi2GaTaO7 and Bi 2InTaO7 have
a distorted pyrochlore-type structure and crystallize in the cubic space group Fd3m. The
compounds absorb in the in the visible and UV region. The ability of H2 evolution over
the In containing compound from an aqueous MeOH solution under UV irradiation is
larger than that of the Ga containing compound. — (WANG, J.; ZOU, Z.; YE*, J.;
J. Alloys Compd. 377 (2004) 1-2, 248-252; Natl. Inst. Mater. Chem. Res., Tsukuba,
Ibaraki 305, Japan; Eng.) — W. Pewestorf
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