‘Gorceixite’, a Ba-Al phosphate mineral, from Mn-ores of Eastern Ghats Group of Rocks, Odisha, India

  • Sagarika Pradhan
  • Patitapaban MishraEmail author
  • Somnath Khaoash
  • Nilima Dash
  • Birendra Kumar Mohapatra
Original Paper


Gorceixite, a Ba-Al alunite supergroup mineral, associated with ferromanganese ores of the Precambrian Eastern Ghats Group is reported for the first time from Odisha. The characteristics of gorceixite are described using optical microscopy, XRD, FTIR, Raman, SEM-EDAX and EPMA techniques. The Odisha gorceixite is subhedral, with a broadly prismatic habit and occasional twinning. The calculated formula of present gorceixite is (Ba0.54 Ca00.39 Sr0.05)∑0.98 Al2.96 (PO4)2.05(OH)5.H2O. The Ba is partly substituted by Ca and Sr. Texture of the ores indicates that during supergene alteration, earlier silicate minerals, like celsian (Ba-feldspar), were replaced by gorceixite.


Gorceixite Eastern Ghats group of rocks Manganese ore Celsian Odisha 



The authors are highly thankful to the Department of Science and Technology, New Delhi, India for providing financial assistance in the form of a funded project (SR/S4/ES-535/2010).


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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  • Sagarika Pradhan
    • 1
  • Patitapaban Mishra
    • 1
    Email author
  • Somnath Khaoash
    • 1
  • Nilima Dash
    • 2
  • Birendra Kumar Mohapatra
    • 1
  1. 1.Department of GeologyRavenshaw UniversityCuttackIndia
  2. 2.Institute of Minerals and Materials TechnologyBhubaneswarIndia

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