NOMENCLATURA DE PIROXÊNIOS

Abstract

This is the final report on the nomenclature of pyroxenes by the Subcommittee on Pyroxenes established by the Comission on New Minerals and Mineral Names of the International Mineralogical Association. The recommendations of the Subcommittee as put forward in mis report have been formally accepted by the Commission. Accepted and widely used names have been chemically defined, by combining new and conventional methods, to agree as fias as possible with the consensus of present use. Twenty names are formally accepted, among which thirteen are used to represent the end members of definite chemical compositions. In common binary solid-solution series, species names are given to the two end members by the "50% rule". Adjectival modifiers for pyroxene mineral names are defined to indicate unusual amounts of chemical constituents. This report includes a list of 105 previously used pyroxene names mat have been formally discarded by the Commission.