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Journal of alloys and compounds, 2014-11, Vol.612, p.372-379
2014

Details

Autor(en) / Beteiligte
Titel
Structural study and spectroscopic properties of NH4Er(PO3)4
Ist Teil von
  • Journal of alloys and compounds, 2014-11, Vol.612, p.372-379
Ort / Verlag
Kidlington: Elsevier B.V
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
  • Projection along the [100] direction of the NH4Er(PO3)4 structure. [Display omitted] •A structural study of NH4Er(PO3)4 is reported.•IR and Raman spectroscopy results are discussed.•A photoluminescence properties of NH4Er(PO3)4 are developed. Single crystals of NH4Er(PO3)4 polyphosphate have been prepared by the flux method and its structural and physical properties have been investigated. This compound crystallizes in the monoclinic system, with space group P21/n and the following parameters: a=10.259(3)Å, b=8.884(3)Å, c=10.910(3)Å, β=106.27(1)°, V=954.5(5)Å3 and Z=4. Its structure is characterized by PO4 phosphate groups which are assembled through common vertices to form (PO3)n spiral chains running along the [101] direction. These chains are linked to each other by ErO8 polyhedra through common corners. In such a way the resulting 3D framework forms large tunnels, parallel to the [100] direction, where the NH4+ ions are located. Raman and FT-IR spectra have been registered and discussed. Absorption, excitation and emission spectra of NH4Er(PO3)4 have been investigated for the first time: they show bands characteristics of the Er3+ ions. Decay curves for 2H11/2, 4S3/2 and 4F9/2 levels of Er3+ ion have also been studied.

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