Fluorite spectra

Fluorite Visible Spectra (generally 350 - 1500 nm)

Fl grn image; Fluorite, green, Felix Mine, Azusa, Los Angeles County, California. The bands near 580 and 400 nm are associated with trapped electrons (F-center) in the presence of yttrium (Y³⁺) ions. The band near 714 nm has been associated with a F-center near cerium (Ce) ions. Data Files: 21K;
Fl pink image; Fluorite, pink, Huanzala, Peru. This spectrum shows the 485 nm band from a O₂^3- molecular ion stabilized by an adjacent Y³⁺ ion in addition to the 400 and 580 nm bands from the Y associated F-center. Data Files: 21K;
Fl purp image; Fluorite, purple, unknown locality. The band near 560 nm is associated with colloidal calcium. Data Files: 21K;
Fl bright green image; Fluorite, green, Brazil. This bright green variety is known locally as chromium-green fluorite. The color is not due to chromium, but rather the bands near 690, 611, 440 and 422 nm are associated with divalent samarium (Sm²⁺) ions. Data Files: 21K;