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1 LMTG, UMR 5563, équipe Minéralogie, Université P. Sabatier, 39 Allées Jules Guesde, 31000 Toulouse, France
2 Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden
3 Smithsonian, National Museum of Natural History, 10th & Constitution Avenue NW, Washington DC 20560, USA
* E-mail: fontan{at}lmtg.obs-mip.fr
Holotype material and other specimens of elfstorpite from the Sjögruvan deposit, Örebro, Sweden have been characterized by powder X-ray diffraction and chemical analysis. The mineral is indistinguishable from allactite, which has priority, and consequently elfstorpite should be discredited. The IMA Commission on New Minerals and Mineral Names has approved the proposition.
KEYWORDS: Mn arsenate, allactite, elfstorpite, Sjögruvan, Sweden
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