Structural and luminescent characterisation of uraniferous fluorapatite and haematite associated with phosphatic rocks of the Bijawar group in Sagar District, Madhya Pradesh (India)

  • Pragya PanditEmail author
  • Shailendra Kumar
  • Pargin Bangotra
  • Rohit Mehra
  • Manoj Mohapatra
  • Madhuparna Roy
  • A K Singh


The structural and spectroscopic characteristics of phosphatic ferruginous shale samples from the Bijawar Group rocks from Sagar District of Madhya Pradesh (India) have been probed for identification of uranium species. Fluorapatite (\(\hbox {Ca}_{5}\hbox {(PO}_{4})_{3}\hbox {F}\), FAP) and haematite (\(\upalpha \)-\(\hbox {Fe}_{2}\hbox {O}_{3}\)) were identified as the main phases in the separated mineral concentrates. The photoluminescence (PL) and X-ray absorption near edge spectroscopy (XANES) studies pointed to a strong experimental evidence of both U(IV) and U(VI) oxidation states in the mineral concentrate portion obtained from the same parent host rock. The PL spectrum has confirmed the charge transfer (f–d) transition bands in UV and near-UV regions with emission peaks at ca. 290, 313, 336, 399 and 416 nm, which has been attributed to the substitution of \(\hbox {Ca}^{2+}\) ions by U(IV) in FAP and broad structureless emission due to stabilisation of U(VI) as \(\hbox {UO}_{6}^{6-}\) in haematite. Time-resolved spectroscopy studies have revealed biexponential decay components lasting 2–5 ns for U(IV) species and \(10\,\upmu \hbox {s}\) for U(VI) species. These characterisations revealed the fundamental information about the oxidation state and form of uranium in this region. Remediation measures for the Bijawar region are also suggested.


Uranium photoluminescence X-ray absorption spectroscopy X-ray diffraction 



The authors deeply acknowledge Ms. Parasmani Rajput and Mr S N Jha, RRCAT, Indore for their help in XANES measurement and Mr Raghvendra Reddy, IUC, Indore for his help in Mössbauer measurements. The authors also like to thank Mr A K Rai, the Director, AMD, for granting the permission to pursue this project.

Supplementary material

12040_2018_1009_MOESM1_ESM.docx (112 kb)
Supplementary material 1 (docx 112 KB)


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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  • Pragya Pandit
    • 1
    Email author
  • Shailendra Kumar
    • 1
  • Pargin Bangotra
    • 2
  • Rohit Mehra
    • 2
  • Manoj Mohapatra
    • 3
  • Madhuparna Roy
    • 1
  • A K Singh
    • 4
  1. 1.Atomic Minerals Directorate for Exploration and ResearchNew DelhiIndia
  2. 2.Dr. B.R. Ambedkar National Institute of TechnologyJalandharIndia
  3. 3.Radiochemistry DivisionBhabha Atomic Research CenterMumbaiIndia
  4. 4.Maharaja Surajmal Institute of Technology, USICT, GGSIPUNew DelhiIndia

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