Phase Equilibria and Crystal Chemistry of the CaO-¿Sm2O3-CoOz System at 885 °C in Air
Winnie K. Wong-Ng, William J. Laws, Saul H. Lapidus, James A. Kaduk
The CaO-¿Sm2O3-CoOz system prepared at 885 °C in air consists of two calcium cobaltate compounds, namely, the 2D thermoelectric oxide solid solution, (Ca3-xSmx)Co4O9-z (0 x 0.5) which has a misfit layered structure, and the 1D Ca3Co2O6 which consists of chains of alternating CoO6 trigonal prisms and CoO6 octahedra. Ca3Co2O6 was found to be a point compound without the substitution of Sm on the Ca site. A solid solution region of distorted perovskite, (Sm1-xCax)CoO3-z (0x0.22, space group Pnma) was established. The reported Sm2CoO4 phase was not observed at 885 °C, but a ternary Ca-doped oxide, (Sm1+xCa1-x)CoO4-z (I4/mmm) where 0
, Laws, W.
, Lapidus, S.
and Kaduk, J.
Phase Equilibria and Crystal Chemistry of the CaO-¿Sm2O3-CoOz System at 885 °C in Air, Solid State Sciences, [online], https://doi.org/10.1016/j.solidstatesciences.2015.06.003
(Accessed May 17, 2022)