gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/002646199548772 ‘Coutinite’, ‘Coutinhite’ and ‘Neodymite’ Discredited as Identical to Lanthanite-(La) and/or Lanthanite-(Nd) Atencio D. Departamento de Mineralogia e Petrologia, Instituto de Geociências, Universidade de São Paulo, Caixa Postal 11348, 05422-970 São Paulo SP, Brazil 10 1999 63 5 761 762 17 9 1998 26 11 1998 Copyright © 1999, The Mineralogical Society 1999 Abstract

The names ‘coutinite’ [= lanthanite-(Nd)], ‘coutinhite’ [= lanthanite-(La)], and ‘neodymite’ [= lanthanite-(Nd) or lanthanite-(La)], do not follow the rules of nomenclature for rare earth minerals. These names were introduced without International Mineralogical Association (IMA) approval and are now formally discarded (Nomenclature Proposal 98-B) by the Commission on New Minerals and Mineral Names (CNMMN) of the IMA.

 Keywords lanthanite-(La) lanthanite-(Nd) coutinite coutinhite neodymite Curitiba Brazil