Synthesis and Structure of BiMnVO5 and BiMnAsO5
2002; Elsevier BV; Volume: 168; Issue: 1 Linguagem: Inglês
10.1006/jssc.2002.9714
ISSN1095-726X
AutoresX. Xun, Alex Yokochi, A.W. Sleight,
Tópico(s)Magnetic and transport properties of perovskites and related materials
ResumoThe isostructural compounds BiMnVO5 and BiMnAsO5 have been prepared for the first time. Their structures were determined from single-crystal X-ray diffraction data in space group P1 with Z=2. For the vanadate a=6.912(4) Å, b=6.991(2) Å, c=5.354(1) Å, α=108.55(2)°, β=95.98(4)° and r=109.73(4)°. For the arsenate a=6.868(1) Å, b=6.905(2) Å, c=5.360(1) Å, α=109.47(2)°, β=95.91(2)°, and γ=109.32(2)°. The structures are based on MnO6 octahedra sharing one edge to form Mn2O10 groups, Bi2O8 groups, and MO4 tetrahedra with M=As or V. The same moieties are found in the BiMnPO5 structure, which has monoclinic symmetry. However, the triclinic structures for BiMnVO5 and BiMnAsO5 cannot be regarded as distorted versions of the monoclinic BiMnPO5 structure because the connectivity of the moieties is distinctly different.
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