offretite

certainty of origin : Donated directly by the Author.

author(s) : Gonnard

date of publication : 1891

source : Bull.Soc.Fr.Min.Crist.(14) p.58

formula : (Ca,Na,K)(Al1,5Si4,5O12) 4,5H2O

comments about the origin : 1) coll. Gonnard ech. Lab. St Etienne 1963 <Catalog number : 24634>
. 2) coll. Gonnard ech. Musee de Lyon 1964 <Catalog number : 24633>
. 3) etiquette "Don de Mr Gonnard" Musee de Lyon ech.Laverriere 1973

catalog number(s) : 24634,24633

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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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