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Issue 26, 2017
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Magnetically frustrated synthetic end member Mn2(PO4)OH in the triplite–triploidite family

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Abstract

The manganese end member of triplite–triploidite series of compounds, Mn2(PO4)OH, is synthesized by a hydrothermal method. Its crystal structure is refined in the space group P21/c with a = 12.411(1) Å, b = 13.323(1) Å, c = 10.014(1) Å, β = 108.16(1), V = 1573.3 Å3, Z = 8, and R = 0.0375. Evidenced in measurements of magnetization M and specific heat Cp, Mn2(PO4)OH reaches a long range antiferromagnetic order at TN = 4.6 K. As opposed to both triplite Mn2(PO4)F and triploidite-type Co2(PO4)F, the title compound is magnetically frustrated being characterized by the ratio of Curie–Weiss temperature Θ to Néel temperature TN of about 20. The large value of frustration strength |Θ|/TN stems from the twisted saw tooth chain geometry of corner sharing triangles of Mn polyhedra, which may be isolated within tubular fragments of a triploidite crystal structure.

Graphical abstract: Magnetically frustrated synthetic end member Mn2(PO4)OH in the triplite–triploidite family

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Publication details

The article was received on 10 May 2017, accepted on 08 Jun 2017 and first published on 08 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01707C
Citation: Dalton Trans., 2017,46, 8680-8686
  • Open access: Creative Commons BY license
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    Magnetically frustrated synthetic end member Mn2(PO4)OH in the triplite–triploidite family

    O. V. Yakubovich, L. V. Shvanskaya, O. V. Dimitrova, O. S. Volkova and A. N. Vasiliev, Dalton Trans., 2017, 46, 8680
    DOI: 10.1039/C7DT01707C

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