Scheelite CL/FloodGun measurement, Mariano & Ring 1975

Reference	Mariano & Ring 1975 Mariano A. N. & Ring P. J. (1975). Europium-activated cathodoluminescence in minerals. Geochimica et Cosmochimica Acta, 39(5), 649-660. DOI: https://doi.org/10.1016/0016-7037(75)90008-3
Material	Scheelite [ CaWO₄ ] Luminescence of scheelite (blue) on muscovite under UV shortwave illumination, from Yaogangxian Mine, Yaogangxian W-Sn ore field, Yizhang Co., Chenzhou Prefecture, Hunan Province, China © Photo by Géry PARENT (via Wikimedia Commons), Public Domain
Specimen temperature	Ambient
Technique	Cathodoluminescence (CL), using a flood-gun source
Lines	Dy³⁺ 490 nm, 576 nm, Eu³⁺ 616 nm, 703 nm, Sm³⁺ 600 nm, 649 nm, WO4^2- 415 nm

Nominal composition of Scheelite [ CaWO₄ ].
Element	Atoms	At%	Wt%
Ca	1	16.7	13.9
W	1	16.7	63.9
O	4	66.7	22.2