Characterization of clinohumite by selected spectroscopic methods
S Lakshmi Reddy1, N C Gangi Reddy, G Siva Reddy
1Department of Physics, SVD College, Kadapa 516003, India.
Summary
This study characterizes clinohumite using multiple techniques, revealing iron and manganese impurities in distinct mineral sites. These findings enhance our understanding of clinohumite
Area of Science:
- Mineralogy
- Geochemistry
- Materials Science
Background:
- Clinohumite is a rare mineral belonging to the humite group.
- Understanding impurity sites is crucial for its geological and potential technological applications.
Purpose of the Study:
- To characterize clinohumite from the Pamir Mountains.
- To identify and locate impurity ions within the mineral structure.
Main Methods:
- Optical Absorption Spectroscopy
- Electron Paramagnetic Resonance (EPR)
- Near Infrared (NIR) Spectroscopy
- Mössbauer Spectroscopy
Main Results:
- Fe(II) impurities detected in two distinct distorted octahedral sites via optical absorption.
- Mn(II) impurities identified in three different sites using EPR, alongside an iron impurity.
- Mössbauer spectroscopy confirmed iron impurities in two separate sites.
- NIR results attributed to water fundamental vibrations.
Conclusions:
- Clinohumite hosts multiple impurity ions (Fe, Mn) in various crystallographic sites.
- The characterization provides detailed insights into the local structure and impurity distribution.
- This work contributes to the comprehensive understanding of clinohumite mineralogy.
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