Irigenin – an isoflavone: a brief study on structural and optical properties Soubiya M. Buch, Feroz A. Mir, Shakeel ul Rehman, Mushtaq A. Qurishi and Javid A. Banday Eur. Phys. J. Appl. Phys., 62 3 (2013) 31201 Published online: 18 June 2013 DOI: 10.1051/epjap/2013130052