Amphibole Visible Spectra (generally 350 - 2500 nm)

Amphiboles absorb light primarily because of Fe2+ in the M1,M2,M3 and M4 sites, Fe3+, Cr3+, and V3+ in the M2,M1 and M3 sites, and the Fe2+ - Ti4+ or the Fe2+ - Fe3+ intervalance charge transfer. 

Link to an extensive collection of references to mostly color and visible spectroscopy of amphiboles

Back to the list of visible data files

Back to the Mineral Spectroscopy home page

revised 13-May-2018