Guildite Visible Spectra (350 - 1050 nm)
Guildite is a sulphate of both copper and iron with the formula CuFe3+(SO4)2(OH)·4H2O that formed in a mine fire.
The guildite absorption spectrum
- GRR
412 spectrum; Guildite from Jerome, Arizona, is
colored by both copper and iron.
Plotted as 0.15 mm thick.
Link
to references to visible spectroscopy of guilldite.
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