Delvauxite
General
CategoryPhosphate minerals
Formula
(repeating unit)
CaFe
4
(PO
4
,SO
4
)
2
(OH)
8
•(4-6)H
2
O
IMA symbolDvx[1]
Identification
ColorYellow 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.[2] Its chemical formula is CaFe
4
(PO
4
,SO
4
)
2
(OH)
8
•(4-6)H
2
O
.[3] 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).[2] It was found in Bernau, Liege, Belgium and Stredocesky, Czech Republic.[3]

References

  1. 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.
  2. 1 2 http://www.webmineral.com/data/Delvauxite.shtml Webmineral
  3. 1 2 http://rruff.geo.arizona.edu/doclib/hom/delvauxite.pdf Handbook of Mineralogy


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