EPR spectroscopic studies of calcic plagioclases from the Archean anorthosites of Holenarasipur, Karnataka Craton, south India

Iyer, Anantha GV and Gananath, SN (1989) EPR spectroscopic studies of calcic plagioclases from the Archean anorthosites of Holenarasipur, Karnataka Craton, south India. In: Current Science, 58 (16). pp. 915-917.

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Abstract

In the EPR spectra of calcic plagioclases (CP) from the Archean (3095 Myr old) anorthosites of Holenerspipur (Karnataka, India) the $Fe^{3+}$ spectral component occupies the tetrahedral site; this indicates disordered structural state was attained during crystn. The absence of Ti3+ spectral component in the CP is attributed to the presence of $Ti^{4+}$, based on the recognition of $Ti^{3+}$ signal at g = 1.998 in the EPR spectrum of CP heated to $650^0$ under reducing conditions.

Item Type:	Journal Article
Additional Information:	Copyright of this aricle belongs to Indian Academy of Sciences.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	07 Dec 2007
Last Modified:	19 Sep 2010 04:41
URI:	http://eprints.iisc.ernet.in/id/eprint/12459

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