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Francolite

From Wikipedia, the free encyclopedia
Francolite
Francolite found in Russia
General
CategoryPhosphate minerals
Formula(Ca,Mg,Sr,Na)10(PO4,SO4,CO3)6F2−3

Francolite is a carbonate rich variety of the mineral fluorapatite[1] and is present in most sedimentary phosphorites. It has a variable chemical composition which can be represented by (Ca,Mg,Sr,Na)10(PO4,SO4,CO3)6F2−3.[2] The mineral was named after its occurrence at Wheal Franco, Whitchurch, Tavistock District, Devon, England.[1]

References

[edit source]
  1. 1 2 "Mindat.org". Mindat.org. Retrieved 2026-07-27.
  2. ↑ R. A. Benmore, M. L. Coleman, and J. M. McArthur, Origin of is sedimentary francolite from its sulphur and carbon isotope composition. Nature 302: 516, 1983


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