Wong-Ng, W.
, Laws, W.
, Lapidus, S.
and Kaduk, J.
(2015),
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 October 9, 2025)
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Phase Equilibria and Crystal Chemistry of the CaO-¿Sm2O3-CoOz System at 885 °C in Air
Published
Author(s)
, , Saul H. Lapidus, James A. Kaduk
Abstract
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 0Citation
Solid State Sciences
Volume
48
Pub Type
Journals
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Keywords
Phase diagram of CaO-¿Sm2O3-CoOz, thermoelectric oxide system, tie-line phase relationships, structure for (Sm1-xCax)2O3-z, and (Sm1+xCa1-x)CoO4-z
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Created June 27, 2015, Updated November 10, 2018