KEIKO SASAKII, OSAMU TANAIKE
Raman spectra (200-1300 cm-1) were measured for synthesized jarosite-group compounds [MFet(SO4)2(OH)6, M+ = K+, NH4+, Na+, Ag+, and y2Pb2+]. The Raman spectra of jarosite-group compounds are characterized by a tendency for the wavenumbers assigned to two vibrational modes of SO4^2-, υ1(SO4^2-) and υ3(SO4^2-), and three vibrational modes of Fe-O bonds, to decrease with increase in the c unit-cell parameter. The wavenumbers assigned to the υ2(SO4^2-) and υ4(SO4^2-) vibrational modes are independent of the value of c. For plumbojarosite, the peaks corresponding to the υ1(SO4^2-) and υ4(SO4^2-) vibrational modes are broad owing to two overlapping peaks assigned to two types of sulfate groups, SO4^2- ions adjacent and not adjacent to Pb2+ ions. Raman spectra can serve to identify the specific type of jarosite-group compound in poorly crystalline or low-concentration geochemical samples.
@article{493e955e-8a61-4ad9-b16a-74e10e2bbb36,
title={DISTINCTION OF JAROSITE.GROUP COMPOUNDS BY RAMAN SPECTROSCOPY},
author={KEIKO SASAKII and OSAMU TANAIKE},
year={1998},
language={fr}
}TY - JOUR TI - DISTINCTION OF JAROSITE.GROUP COMPOUNDS BY RAMAN SPECTROSCOPY AU - KEIKO SASAKII AU - OSAMU TANAIKE PY - 1998 LA - fr ER -
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