Optical Spectra of Anhydrite, CaSO₄

• Albrecht H (1954)  Anhydrite and albite as cleft minerals from the Simplon tunnel.Schweizerische Mineralogische und Petrographische Mitteilungen 34, 184-5. 
• Tarashchan AN, Platonov AN (1973) Isomorphism and valence transformations of rare earth ions in natural anhydrites according to luminescencedata. Geokhimiya (1973), (8), 1203-1210. In Russian
• Bershov LV, Martirosyan VO, Marfunin AS, Speranskii AV (1975) EPR and structure models for radical ions in anhydrite crystals. Fortschritte der Mineralogie 52, 591-604.   
• Platonov AN, Krasilshchikova OA, Tarashchan AN (1975) Optical absorption of rare earth ions in minerals. Konstitutsiya i Svoistva Mineralov 9, 58-64. In Russian