Chem. Met. Alloys 16 (2023) 14-21
Oksana
ZAREMBA,
Myroslava KURYLAS, Roman GLADYSHEVSKII
https://doi.org/10.30970/cma16.0434
The phase diagram of
the SrO–Pr2O3–CoO system was constructed based on the results of X-ray diffraction
of polycrystalline samples synthesized by solid-state reaction. Under the
conditions of the experiment, the isothermal section contains 9 one-phase, 17
two-phase, and 9 three-phase regions. The formation of three substitutional solid
solutions with extended homogeneity ranges was observed: Sr1-xPrxCoO3
with cubic perovskite-type structure (CaTiO3, Pearson symbol cP5,
space group Pm-3m), Pr1-xSrxCoO3
with orthorhombic perovskite-type structure (GdFeO3, Pearson symbol oP20,
space group Pnma), and Sr2-xPrxCoO4
(tetragonal Ruddlesden-Popper-type structure K2NiF4,
Pearson symbol tI14, space group I4/mmm). The character of
the interaction of the components in the SrO–Pr2O3–CoO system is similar to that observed
in the related system SrO–Nd2O3–CoO.
Phase diagram of the SrO–Pr2O3–CoO system from
this investigation.
Keywords
Oxides / Solid-state synthesis / X-ray
diffraction / Phase diagram / Crystal structure