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Article: Cobaltoan calcites and dolomites from Katanga.(analysis of cobaltoan calcites from Democratic Republic of the Congo)
- Article from:
- The Mineralogical Record
- Article date:
- July 1, 1999
- Author:
CopyrightCOPYRIGHT 1999 The Mineralogical, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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INTRODUCTION
It was pointed out by Douglass (1992) that most mineral specimens labeled as "cobaltoan calcite" are actually "cobaltoan dolomite." In many cases the magnesium content is greater than the calcium content. During the past several years analyses have been performed on various minerals supplied by Gilbert Gauthier. This paper summarizes work on numerous mineral specimens from the Democratic Republic of the Congo along with a few others from localities other than the Congo.
The original motivation for this work was to determine the amount of cobalt required for the vivid pink coloration. Most specimens analyzed are dolomite, but a few are ...