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Diadochite

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Diadochite
Diadochite from Lodenitz, Bohemia
General
CategoryPhosphate minerals
Formula
(repeating unit)		Fe2(PO4)(SO4)OH·5H2O
IMA symbolDdc
Strunz classification8.DB.05

Diadochite is a phospho-sulfate mineral. It is a secondary mineral formed by the weathering and hydration of other minerals. Its formula is Fe2(PO4)(SO4)OH·5H2O. Well crystallized forms are referred to as destinezite, which has been given official recognition by the International Mineralogical Association with diadochite being the poorly formed to amorphous variety.

It has a greenish yellow to brown colour and forms nodules or crusts. Its appearance has been compared to cauliflower.

Identified originally in Belgium in 1831, it has been found in many places throughout the world.

It occurs as a secondary mineral in mineral gossans, coal deposits, phosphate rich pegmatites and cave guano deposits.

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. http://www.mindat.org/min-1279.html Mindat diadochite
  3. http://www.mindat.org/min-5222.html Mindat destinezite
  4. http://rruff.geo.arizona.edu/doclib/hom/diadochite.pdf Handbook of Mineralogy
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