Studies of the orthoamphiboles. II. Hydroxyl spectra of anthophyllites

Abstract

Les spectres infrarouges de plusieurs anthophyllites ont été mesurés dans la région de la vibration de valence du groupement OH (3 800-3 500 cm⁻¹). Les bandes principales présentent une structure hyperfine jusqu'ici inconnue.

Studies of the orthoamphiboles. IV. Mössbauer spectra of anthophyllites and gedrites

“…Some of the problems of distinguishing between different fits have been discussed by Law (1973), and reviewed by Hawthorne (1983aHawthorne ( , 1988; they are implicit also in this paper although not explicitly discussed.…”

“…M6ssbauer spectra have been determined for most of the anthophyllites of Law (1981) and the gedrites of Law (1982). The suite includes two amphiboles for which site occupanies have been determined by X-ray investigation: the Dillon anthophyllite (Finger, 1969) and the Orange area gedrite I34I (Papike and Ross, 1970;Robinson and Jaffe, 1969).…”

“…However, spectra of anthophyllites were satisfactorily fitted by Lorentzians and there could be no statistical justification for using the more complex profile (cf. Law, 1973). Many gedrite spectra cannot be satisfactorily fitted, but the resolution of peaks in these spectra is not sufficient to allow statistical tests to differentiate between different lineshapes.…”

“…This is typical 's' denotes results from Seifert (1977), notation changed in line with convention adopted here; published estimated error for these 6 and ~ values is +0.005 aa%/sec. Value in parentheses under speciman number in first column is residual ( 'chi-squared' ); see Law (1973).…”