Abstract

Cesium kupletskite has been renamed kupletskite-(Cs) with the approval of the IMA Commission on New Minerals, Nomenclature and Classification, because the name of a mineral species should be a single word and the International Union of Pure and Applied Chemistry spelling is caesium. The presence or absence of parentheses around the suffix chemical-element is discussed. The advantages of the chemical-element suffix nomenclature are stated.

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