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certainty of origin : Donated directly by the Author.

author(s) : Agrell, Bown and Mc Kie

date of publication : 1965

source : Am.Min.(50) p.278

formula : NaMn3Fe7(Fe,Al)2 (OH)11 Si12O32

comments about the origin : Agrell par Davis 1976

Return to the Type or Author's Specimen Catalog

This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.

(C) BRGM, ENSMP

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