Arrojadite-group nomenclature: sigismundite reinstated

Abstract

The name sigismundite has been reinstated from arrojadite-(BaFe) following the IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) recommendations defined by Hatert et al. (2013) for the preservation of historical names. The name change was approved by the CNMNC, voting proposal 22-C. The new mineral symbol for sigismundite is Sigi. Sigismundite honours Pietro Sigismund (1874–1962), and this paper outlines his significant contributions to Italian mineralogy.