Baryte measurement, Dorenbos 2003

Reference	Dorenbos 2003 Dorenbos P. (2003). Anomalous luminescence of Eu2+ and Yb2+ in inorganic compounds. Journal of Physics-Condensed Matter, 15(17), 2645-2665. DOI: https://doi.org/10.1088/0953-8984/15/17/318
Material	Baryte [ BaSO₄ ] Barite specimen from Elk Creek locality, Dalzell, Meade County, South Dakota, USA. Size: 2.3 x 1.3 x 1.3 cm © Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
Specimen temperature	Ambient
Technique	Unknown
Line	Yb²⁺ 381 nm

Nominal composition of Baryte [ BaSO₄ ].
Element	Atoms	At%	Wt%
Ba	1	16.7	58.8
O	4	66.7	27.4
S	1	16.7	13.7