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2005
Structure
D 2000
31- 004
Re-Examination of the Structure of Ba2MIrO6 (M: La, Y): Space Group Revised.
— The crystal structures of the title compounds are redetermined by Rietveld refinement of the powder XRD data. In agreement with previous results, both compounds are
ordered perovskites but with different symmetries. The octahedra in Ba2LaIrO6 (I) are
tilted around the three-fold [111]p-axis of the cubic aristotype while no octahedral
tilting occurs in Ba2YIrO6 (II). Consequently, (I) crystallizes in the space groups R3 and
(II) in Fm3m. — (FU*, W. T.; IJDO, D. J. W.; J. Alloys Compd. 394 (2005) 1-2,
L5-L8; Gorlaeus Lab., Inst. Chem., Leiden Univ., NL-2300 RA Leiden, Neth.; Eng.)
— Schramke
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