Characterisation of prehnite by EPMA, Mössbauer, optical absorption and EPR spectroscopic methods.
A sample of prehnite from Rayalaseema zone of Andhra Pradesh, India containing about 2.565 wt.% Fe(2)O(3) is used in the present work. The mineral has been characterized by EPMA, optical absorption, EPR, NIR and Mössbauer techniques. Mössbauer studies confirm the presence of iron as an impurity in two sites. An EPR study on powder sample confirm the presence of Fe(III) impurity in the mineral. Optical absorption spectrum also indicates that Fe(III) impurity is present in two sites with octahedral structure. NIR results are due to water fundamentals.
Reddy
N C Gangi
NC
Department of Chemistry, S.V.U.P.G. Centre, Kadapa 516003, India.
Fayazyddin
S Md
SM
Reddy
R Rama Subba
RR
Reddy
G Siva
GS
Reddy
S Lakshmi
SL
Rao
P Sambasiva
PS
Reddy
B Jagannatha
BJ
D000538:Aluminum Silicates / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005290:Ferric Compounds / Q000737:chemistry*; D007194:India; D013053:Spectrophotometry / Q000379:methods*; D015204:Spectroscopy, Mossbauer / Q000379:methods*; D028561:Transition Elements / Q000737:chemistry*
D000538:Aluminum Silicates; D005290:Ferric Compounds; D028561:Transition Elements; C510100:prehnite