Sapphirine Visible Spectra (300 - 1500 nm)
Sapphirine, Mg4(Mg3Al9)O4[Si3Al9O36], gets its name from the fact that its color commonly resembles sapphire.
Image of the sapphirine absorption spectrum
- Sapphirine
N-124 spectrum; from Noyabrskaya kimberlinte pipe, Yukutia,
Russia.Plotted
as
10.0 mm thick.
The greenish-blue color of this material comes, in large part from
chromium. Composition: (Mg3.40Fe0.23Al3.25Cr0.16) Al 1.00
[Al4.53Si1.47O20]. Data from Langer K,
Platonov AN, Matsuk SS, Andrut M (1994)
Electronic absorption spectra of chromium-bearing sapphirine Phys Chem
Minerals 21, 29-35.
- Sapphirine Sl-48 spectrum;
from Sludyanka kimberlite pipe, Yukutia,
Russia.
Plotted as
10.0 mm thick.
The greenish-blue color of this material comes, in large part from
chromium. Iron intervalence charge transfer features are also present
at ~680 and 880 nm Composition (Mg2.53Fe0.55
Mn0.04Ti0.034+Al3.55Cr0.08)
Al1.00
[Al4.28Si1.73O20].
Data from Langer K, Platonov AN, Matsuk SS, Andrut M (1994) Electronic
absorption spectra of chromium-bearing sapphirine Phys Chem Minerals
21, 29-35.
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