Chemical Formula:See CORUNDUM
Familly: Oxides and hydroxides
Status: NR
Crystal System: Rhomboedric
Mineral for Display: No
UV Type | Main color | Intensity | Observation Frequency |
---|---|---|---|
Long Waves (365nm): | Red | Weak | |
Other colors LW: | Violet red , |
Daylight Picture
Long Waves Picture (365nm)
Galerie de photos:
The directory does not exist...To the gallery ( images in the gallery)
Most Common Activator: Cr3+
Other activators: Fe3+ ,
Peaks in the spectrum (nm):
Cr3+ replacing Al : Lines at 692.8, 694.3nm (R1 and R2 lines) Cr3+ : 658.2 , 668.2 , 674.1 , 680 (small lines) N-lines (Cr3+ pairs) : 705.8 , 712nm (small lines) Fe3+ : broad band peaking at 896nm (Sapphire)
Activator: Cr3+ replacing Al giving strong well known 2E->4A2 lines with long decay time Besides that, much weaker narrow lines present, which are connected with Cr-pairs and more complicated complexes (so called N-lines) (Tarashchan 1978).
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
http://www.mindat.org/show.php?name=Sapphire
http://webmineral.com/data/Sapphire.shtml
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