✦ LIBER ✦
Bi23M4O44.5 (M = P and V): new oxide-ion conductors with triclinic structure based on a pseudo-fcc subcell
✍ Scribed by Akiteru Watanabe
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 501 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0167-2738
No coin nor oath required. For personal study only.
✦ Synopsis
27(l)", p = 87.51(l)", and y = 119.82( 1)" for M =V Two formula weights are contained in the'unit cell. The structure is based on a pseudo-fee subcell with a' = 5.5 A. The axial relations between the triclinic cell and the subcell are a = b = (3 &/2)a' and c = (3 v'&2)a'. The compounds show a good oxide-ion conduction. In particular, Bi,,V,O,,,, is excellent: c= IO-* mho cm ', activation energyx0.78 eV, and O-' transport numberz0.9 at about 600°C. Both compounds melt congruently at about 950°C without polymorphic transformation.