Opal CL measurement, Richter <i>et al.</i> 2003

Opal CL 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	Opal [ SiO₂·nH₂O ] Dark Jubilee Opal specimen (318.44ct) from Coober Pedy, South Australia, Australia Photo by Chip Clark, via Smithsonian National Museum of Natural History
Specimen temperature	Ambient
Analysis technique	Cathodoluminescence (CL)
Lines	Unspecified 650 nm, 540 nm

Nominal composition of Opal [ SiO₂·nH₂O ].
Element	Atoms	At%	Wt%
H	3.47	3.47	0.181
Si	32.24	32.24	46.73
O	64.29	64.29	53.09
Total	100	100	100