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Manganohörnesite
A valid IMA mineral species - grandfathered
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About Manganohörnesite
Formula:
Mn2+3(AsO4)2 · 8H2O
May contain some Mg replacing Mn.
Colour:
White to colorless
Lustre:
Silky
Hardness:
1
Specific Gravity:
2.64
Crystal System:
Monoclinic
Member of:
Name:
Originally named manganese-hoernesite in 1951 by Olof Gabrielson for being the manganese analogue of hornesite (now hörnesite). It was renamed by the IMA (Burke 2008) to manganohörnesite.
Isostructural with:
Vivianite Group. Related to monteneroite.
A lower hydrate (tetrahydrate) is castellaroite.
Crystals of manganohörnesite may resemble hörnesite and gypsum.
A lower hydrate (tetrahydrate) is castellaroite.
Crystals of manganohörnesite may resemble hörnesite and gypsum.
Schmiedestollen dump, Wittichen, Schenkenzell, Rottweil, Freiburg Region, Baden-Württemberg, Germany