FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta valley, Italy)

Giancarlo Della Ventura*, Annibale Mottana, Gian Carlo Parodi, William L. Griffin

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper deals with a crystal-chemical, infrared spectroscopic study of monoclinic epidotes from Praborna (St. Marcel, Val d'Aosta, Italy). The studied samples range in composition from clinozoisite (Czo) to Sr-rich piemontite (Pm). In the OH-stretching region, (Al,Fe3+)-clinozoisites show a single broad band centred in the range 3345-3380 cm-1 which is assigned to the [M2]Al-O10→H...O4-[M1,3](Al,Fe3+) configuration. The spectra of Sr-rich piemontites show a well-resolvable doublet at almost constant wavenumbers (3417/3454 cm-1) which can be explained by two simultaneous effects: (i) the entry of Mn3+ in the non-OH-coordinated M3 octahedra and, (ii) the entry of Sr substituting for Ca in A2.

Original languageEnglish
Pages (from-to)655-665
Number of pages11
JournalEuropean Journal of Mineralogy
Volume8
Issue number4
Publication statusPublished - Jul 1996
Externally publishedYes

Keywords

  • Cell-parameters
  • Chemistry
  • Epidote
  • Infrared spectroscopy
  • OH-stretching
  • Piemontite
  • St. Marcel

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