ORIGIN OF PEGMATITES IN THE LARVIK PLUTONIC COMPLEX, NORWAY ØYVIND SUNDE§ AND HENRIK FRIIS Natural History...University of Oslo, P.O. Box 1172, Blindern, 0318 Oslo, Norway TOM ANDERSEN Department of Geosciences, University...University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, Norway ABSTRACT Wöhlerite is an abundant primary high...Permian Larvik Plutonic Complex in the Oslo Rift, Norway. Wöhlerite has a flexible crystal-chemical structure...rare-earth elements, petrology, mineralogy, Oslo Rift, Norway. INTRODUCTION Wöhlerite, ideally Na2Ca4Zr(Nb |