Delvauxite, also known as borickite, is a yellow to brown to dark brown amorphous mineral, sometimes forming a botryoidal mass.[2] Its chemical formula is CaFe
4(PO
4,SO
4)
2(OH)
8•(4-6)H
2O.[3] and it may sometimes form stalactites.
Delvauxite | |
---|---|
General | |
Category | Phosphate minerals |
Formula (repeating unit) | CaFe 4(PO 4,SO 4) 2(OH) 8•(4-6)H 2O |
IMA symbol | Dvx[1] |
Identification | |
Color | Yellow to brown to dark brown |
It was first described in 1838 by Belgian geologist André Dumont and dedicate to chimist Charles Delvaux de Fenffe (1782–1863) who first analysed its chemical composition.[2] It was found in Bernau, Liege, Belgium and Stredocesky, Czech Republic.[3]