Esmarkite (of Berzelius)
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|Name:||Name introduced by Berzelius for a mineral found at the Brekke Farm, Bamble, Telemark. The name is in honour of the vicar and mineralogist Hans Morten Thrane Esmark (1801-1882). A chemical analysis of the mineral showed it to be an alumosilicate of magnesium and iron. Erdmann (1840) regarded it as a hydrous dichroite (= cordierite)|
A weathered cordierite.