gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1969.037.285.05 Axinites from the Contact Skarns of the Meldon Aplite, Devonshire, England Chaudhry M. Nawaz Department of Geology, University of the Panjab, Lahore, West Pakistan Howie R. A. Department of Geology, King's College, London, W.C. 2 3 1969 37 285 45 48 2 7 1968 Copyright © 1969, The Mineralogical Society 1969 Summary

Chemical analyses, optical properties, and specific gravities are presented for nine axinites. A reciprocal substitution relationship is demonstrated between Mg and Mn2+, and a linear variation diagram is constructed between refractive indices and the (Fe2++Fe3++Mn2++Ti) ions calculated on the basis of 16(O,OH). The composition of these axinites is independent of the composition of their host rocks; their colour appears to be independent of the Fe2+/Mn2+ ratio for the range of iron and manganese values of the specimens investigated.