silhydrite

certainty of origin : Donated directly by the Author.

author(s) : Gude and Sheppard

date of publication : 1972

source : Am.Min.(57) p.1053-1065

formula : 3SiO2 H2O

comments about the origin : Gude 1972

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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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