gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1988.052.368.16 Short Communications First Occurrence of Dalyite in Extrusive Rock Linthout K. Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands Nobel F. A. Geologisch Instituut, Nieuwe Prinsengracht 130 1018 VZ Amsterdam, The Netherlands Lustenhouwer W. J. Netherlands Organization for Scientific Research (ZWO), De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands 12 1988 52 368 705 708 3 2 1988 Copyright © 1988, The Mineralogical Society 1988 dalyite alkali-zirconosilicate perpotassic lamproite Spain