gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1948.028.200.02 The Occurrence of an Orthorhombic High-Temperature Form of Ca₂SiO₄ (Bredigite) in the Scawt Hill Contact-Zone and as a Constituent of Slags Tilley C. E. F.R.S. Vincent H. C. G. M.A. Department of Mineralogy and Petrology, University of Cambridge. 3 1948 28 200 255 271 Copyright © 1948, The Mineralogical Society 1948