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
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