A mossbauer study of unusual golden colour mica from high heat producing granite of Malani igneous suite, north-west, India

Mossbauer study of an unusual golden coloured mica from the high heat producing granite, Malani Igneous Suite has been performed at 300° K. Result shows presence of the unique four Fe³⁺ doublets for the first time ever in any mica. The four Fe³⁺ doublets occur probably because of the presence of a mixed type of octahedral layers, one like that in the common mica and the other containing impurities.