Delvauxite
A variety of Minerals
What is Delvauxite?
Delvauxite, also known as borickite, is a yellow to brown to dark brown amorphous mineral, sometimes forming a botryoidal mass. Its chemical formula is CaFe4(PO4,SO4)2(OH)8•(4-6)H2O. and it may sometimes form stalactites. It was first described in 1838 by Belgian chemist, Dumont and dedicate to J.S.P.J. Delvaux de Fenffe (1782–1863). It was found in Bernau, Liege, Belgium and Stredocesky, Czech republic.
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Delvauxite Localities Map
See where Delvauxite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Yellowish brown, brownish black, reddish, chestnut-brown
- Hardness (Mohs)
- 2.5
- Density
- 1.85 g/cm³
- Streak
- Yellow, pale brown
Chemical Properties
- Chemical Formula
- CaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed
- Elements
- Ca, Fe, H, O, P, S
Also Known As
DelvauxiteFouchéiteFouchéritePicite
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