| Delvauxite | |
|---|---|
.jpg) | |
| General | |
| Category | Phosphate minerals |
| Formula (repeating unit) | CaFe 4(PO 4,SO 4) 2(OH) 8•(4-6)H 2O |
| IMA symbol | Dvx |
| Identification | |
| Color | Yellow to brown to dark brown |
Delvauxite, also known as borickite, is a yellow to brown to dark brown amorphous mineral, sometimes forming a botryoidal mass. Its chemical formula is CaFe
4(PO
4,SO
4)
2(OH)
8•(4-6)H
2O. and it may sometimes form stalactites.
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. It was found in Bernau, Liege, Belgium and Stredocesky, Czech Republic.
References
- Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ http://www.webmineral.com/data/Delvauxite.shtml Webmineral
- ^ http://rruff.geo.arizona.edu/doclib/hom/delvauxite.pdf Handbook of Mineralogy
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