A Diffuse Reflectance Study of Synthetic Acanthite, Stibnite and Bournonite

Authors

  • B. Mishra
     Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302
  • K. L. Pruseth
     Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302
  • S. Sarkar
     Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302

Keywords:

Mineral Synthesis, Acanthite, Stibnite, Boumonite, Reflectance Spectroscopy.

Abstract

Acanthite (Ag2S), Stibnite (Sb2S3) and Boumonite (CuPbSbS3) were synthesized by the evacuated silica tube method under dry conditions. Boumonite was synthesized both from its elemental composition and from the component sulfides. All the products were characterized by the optical and XRD methods and were found to be pure, homogeneous and direct semiconductors.

Diffuse reflectance studies were undertaken on these synthetic mineral phases. The forbidden energy gap (Eg) was calculated by α2 vs. hν plots and linear extrapolation to α2 = zero. Eg was also deduced by calculating the Kubelka - Munk remission function, and plotting it against the photon energy. The Eg values obtained were: acanthite 0.98, 1.0 eV; stibnite 1.50, 1.55 eV and boumonite 1.15, 1.23 eV. Possible industrial application of these syntheti∼ semiconducting mineral phases are discussed.

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Issue

Volume 37, Issue 1, January 1991

Section

Research Papers

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Published

1991-01-01

How to Cite

Mishra, B., Pruseth, K. L., & Sarkar, S. (1991). A Diffuse Reflectance Study of Synthetic Acanthite, Stibnite and Bournonite. Journal of Geological Society of India, 37(1), 7–12. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/66972

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