Crystal structure and thermal expansion of perovskites containing uranium (VI) and rare-earth elements

稀土学报(英文版), 2009, 27(1): 4-11. doi: 10.1016/S1002-0721(08)60180-5

^1, , ^2, , ^3,

1.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

2.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

3.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

Crystal structure and thermal expansion of perovskites containing uranium (VI) and rare-earth elements

Aleksandr ^1, , Anna Ershova ^2, , Nikolai Chernorukov ^3,

1.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

2.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

3.Nizhny Novgorod State University,Gagarin Prospekt 23/2,603950 Nizhny Novgorod,Russia

Keywords： perovskite

By the method of high-temperature reactions in solid phase, compounds with the general formula MII(AIII2/3U1/3)O3 (MII=Sr, AIII=Sc, In; MII=Ba, AIII=Sc, In, Y, Nd-Lu) were synthesized. Their structures (space groups Fmm and Pnma) were refined by the Rietveld method and morphotropic transition in Ba(Ln2/3U1/3)O3 on the border of Gd-Tb was discovered. By means of high-temperature X-ray diffraction, phase transitions were studied and thermal expansion coefficients were determined.

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Crystal structure and thermal expansion of perovskites containing uranium (VI) and rare-earth elements

参考文献