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Table II Selenium K-edge energies for reference standards, based on maximum of first derivative of XANES spectra

From: Micro-spectroscopic investigation of selenium-bearing minerals from the Western US Phosphate Resource Area

Species K-edge energy (eV)
Organic Se compounds
Se-cystine 12 657.5
Se-eithionine 12 659.0
Se-methionine 12 659.0
Se-methyl-selenocysteine 12 659.5
Se(-II) compounds
CuSe 12 656.0
FeSe2 (Synthetic Ferroselite) 12 657.0
CuSe2 (Krutaite) 12 657.0
NiSe2 (Penroseite) 12 657.0
ZnSe 12 656.5
Cu1.8Se (Berzelianite) 12 656.5
SeS2 12 658.0
Se (0) compounds
Elemental Se (monoclinic) 12 658.0
Elemental Se (orthorhomblic) 12 658.0
Se (IV) compounds
Na2SeO3 12 662.0
CuSeO3H2O (Chalcomenilte) 12 662.0
Fe2Se3O96H2O (Mandarirnoite) 12 662.0
Se (VI) compounds
Na2SeO4 12 664.0