Synthesis and characterization of divalent-europium (Eu2+) compounds, EuB4O7, EuB2O4 and Eu2B2O5

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Abstract

Several new compounds, EuB4O7, EuB2O4 and Eu2B2O5 were synthesized. EuB4O7 and EuB2O4 crystallized in the orthorhombic, space group C2v7-Pnm21 with cell dimensions: a = 4.435(1), b = 10.731(1), c = 4.240(1) Å and Z = 2, and space group D2h14-Pnca with cell dimensions: a = 6.593(1), b = 12.063(2), c = 4.343(1) Åand Z = 4, respectively. Eu2B2O5 is monoclinic, space group C2h5-P21a with cell dimensions: a = 11.91(1), b = 5.36(1), c = 7.74(1) Å, β = 92.7(1)° and Z = 4. The IR patterns of EuB4O7, EuB2O4 and Eu2B2O5 were able to be ascribed to a three-dimensional network of BO4-tetrahedra, an endless chain of BO3 groups, (BO2), and a B2O54− ion, respectively. The magnetic susceptibilities of these compounds were measured. EuB4O7 and Eu2B2O5 were paramagnetic in the ranges of measured temperature, and EuB2O4 was an antiferromagnet with the Néel temperature TN = 3 K. Their magnetic properties were understood by considering the relationship between their structures and the magnetic interactions.

References (16)

  • H. Hata et al.

    Mat. Res. Bull.

    (1977)
  • J.E. Greedan et al.

    Mat. Res. Bull.

    (1972)
  • G.J. McCarthy et al.

    Inorg. Chem.

    (1975)
  • J.E. Greedan et al.

    Inorg. Chem.

    (1975)
  • B.T. Matthias et al.

    Phys. Rev. Lett.

    (1961)
  • J.C. Suits et al.

    J. Appl. Phys.

    (1971)
  • M.N. Churelova et al.

    Tr. Tomsk. Gos Univ.

    (1971)
  • K. Machida et al.

    Acta Cryst.

    (1979)
There are more references available in the full text version of this article.

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