Optical Spectra of Spodumene

• Stuhlman OJ, Daniel AF (1928) The X-ray phosphorescent and thermophosphorescent radiations of kunzite. Journal of the Optical Society of America, 17, 289–293. 
• Claffy EW (1953) Composition, tenebrescence and luminescence of spodumene minerals. American Mineralogist 38, 919-931. 

• Platonov AN, Tarashchan AN (1973) Optical spectroscopy of vanadium in natural minerals. III. Absorption spectra of vanadium(4+) and vanadium(3+) complexes. Konstitutsiya i Svoistva Mineralov 7, 75-81. In Russian
• Leckebusch R, Recker K (1974) On the color of spodumene from Afghanistan. Fortschritte der Mineralogie, Beiheft 51, 83. In German
• Leckebusch R, Recker K, Triche C (1974) Relation between color and luminescence of Afghanistan spodumenes and their chromium, manganese, and iron content. Comptes Rendus des Seances de l'Academie des Sciences, Serie D: Sciences Naturelles 278, 1541-1544. In French
• Schmitz B, Lehmann B (1975) Color centers of manganese in natural spodumene, LiAlSi₂O₆. Bererichte Bunsengesellschaft fur Physikalische Chemmie 79, 1044-1049.
• Hassan F, Labib M (1978) Induced color centre in alpha-spodumene called kunzite. Neues Jahrbuch Für Mineralogie Abhandlungen 134, 104–115.     
• Lehmann G (1978) Solid-State Photochemistry -- A Method of Generating Unusual Valence States. Angewandte Chemie International Edition, English 17, 89-97.
  

• Cohen AJ, Janezic GG (1983) The crystal-field spectra of the 3d³ ions, Cr³⁺ and Mn⁴⁺ in green spodumenes. In: The Significance of Trace Elements in Solving Petrogenetic Problems & Controversies. Theophrastus Pubs. S.A., Athens. 
• Fujii AT, Isotani S (1983) Comparative study of five varieties of spodumene through optical absorption. Report (1983), (IFUSP-P-437), 33 pp. 
• Ito AS; Isotani S (1983) Optical absorption and electron spin resonance in natural, irradiated and heated spodumene. Report (1983), (IFUSP-P-429), 46 pp.
• Taran MN, Platonov AN, Rossovskii LN, Pol'shin EV (1984) Study of the nature of the color of spodumenes. Kristallokhimiya i Spektroskopiya Mineralov, Kiev (1984), 31-48. In Russian
• Khomenko VM, Platonov AN (1985) Electronic absorption spectra of Cr³⁺ ions in natural clinopyroxenes. Physics and Chemistry of Minerals 11, 261-265.
• Fujii AT, Isotani S (1988) Optical absorption study of five varieties of spodumene. Anais da Academia Brasileira de Ciencias 60(2), 127-35
  
• Isotani S, Fujii AT, Antonini R, Furtado WW (1988) Optical absorption study of radiation and thermal effects in Brazilian samples of spodumene.Instituto de Fisica, Universidade de Sao Paoul Publicacoes IFUSP/P-703. 29 pages.
  

• Isotani S, Fujii AT, Antonini R, Pontuschka WM, Rabbani SR, Furtado WW (1991) Optical absorption study of radiation and thermal effects in Brazilian samples of spodumene. Anais da Academia Brasileira de Ciencias 63, 127-39.
• Ito AS, Isotani S (1991) Heating effects on the optical absorption spectra of irradiated, natural spodumene. Radiation Effects and Defects in Solids 116, 307-314.
• Walker G, El Jaer A, Sherlock R, Glynn TJ, Czaja M, Mazurak Z (1997) Luminescence spectroscopy of Cr³⁺ and Mn²⁺ in spodumene (LiAlSi₂O₆). Journal of Luminescence 72–74, 278–280.   

• Isotani S, Watari K, Mizukami A, Bonventi W, Ito AS (2007) UV optical absorption spectra analysis of spodumene crystals from Brazil. Physica B: Condensed Matter (Amsterdam, Netherlands), 391,  322-330.

• Noithong P, Pakkong P, Naemchanthara K (2013) Color change of spodumene gemstone by electron beam irradiation. Advanced Materials Research 770, 370-373.
• Shang-I EL, Bosshart G, Ming-sheng P (2017) Reinvestigation of Causes of Colour in Natural an Irradiated Green Spodumene. The Journal of the Gemmological Association of Hong Kong 38, 79–81.    

• Czaja M, Lisiecki R, Kadziołka-Gaweł M, Winiarski A (2020) Some Complementary Data about the Spectroscopic Properties of Manganese Ions in Spodumene Crystals, Minerals 10, 554. 17 pages.
• Rehman HU, Martens G, Tsai YL, Chankhantha C, Kidkhunthod P, Shen AH (2020) An X-ray Absorption Near-Edge Structure (XANES) Study on the Oxidation State of Chromophores in Natural Kunzite Samples from Nuristan, Afghanistan. Minerals 10, 463. 11 pages
• Zandi F (2020) Blue spodumene. Gems & Gemmology 57, 423-424.
• Blumentritt F, Fritsch E (2021) Photochromism and Photochromic Gems: A Review and Some New Data (Part 1). The Journal of Gemmology 37,780-800.