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Synthesis and investigation of neptunium zirconium phosphate, a member of the NZP family: crystal structure, thermal behaviour and Mössbauer spectroscopy studies
Ist Teil von
Dalton transactions : an international journal of inorganic chemistry, 2017-09, Vol.46 (35), p.11626-11635
Ort / Verlag
England
Erscheinungsjahr
2017
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A new double neptunium zirconium phosphate of the type M
x
Zr
2
(PO
4
)
3
(M = Np), crystallizing in the structure type NaZr
2
(PO
4
)
3
(NZP, NASICON), was synthesized by solid state reactions at high temperatures and characterized by X-ray diffraction, infrared spectroscopy and Mössbauer spectroscopy. The Rietveld refinement of the XRD pattern together with the analysis of the IR spectra of the sample confirmed the space group
P
3&cmb.macr;
c
, the same as that for the lanthanide analogues Ln
0.33
Zr
2
(PO
4
)
3
. However, Mössbauer studies revealed the presence of neptunium in the two oxidation states +3 and +4, indicating a two-phase NZP system with different crystallographic environments of the neptunium atoms. The thermal behaviour of the sample was followed up to 1400 °C by thermogravimetric analysis.
We synthesized a new NZP-type neptunium zirconium phosphate Np
0.29
Zr
2
(PO
4
)
3
and investigated it by Rietveld analysis, infrared spectroscopy and Mössbauer spectroscopy.
Sprache
Englisch
Identifikatoren
ISSN: 1477-9226
eISSN: 1477-9234
DOI: 10.1039/c7dt02110k
Titel-ID: cdi_pubmed_primary_28832053
Format
–
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