Sapphire measurement, Richter <i>et al.</i> 2003

Sapphire measurement, Richter et al. 2003

Reference	Richter et al. 2003 Richter D. K., Götte T., Götze J. & Neuser R. D. (2003). Progress in application of cathodoluminescence (CL) in sedimentary petrology. Mineralogy and Petrology, 79(3-4), 127-166. DOI: https://doi.org/10.1007/s00710-003-0237-4
Material	Sapphire [ Al₂O₃ ] Sapphire specimen from Malawi © Photo by Greg Polley, via Smithsonian National Museum of Natural History
Specimen temperature	Ambient
Technique	Unknown
Lines	Cr³⁺ 692.9 nm, 694.3 nm, F-center 415 nm

Nominal composition of Sapphire [ Al₂O₃ ].
Element	Atoms	At%	Wt%
Al	2	40	52.9
O	3	60	47.1