Francolite Explained

Francolite
Category:Phosphate minerals

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 .[2] The mineral was named after its occurrence at Wheal Franco, Whitchurch, Tavistock District, Devon, England.[1]

Notes and References

  1. http://www.mindat.org/min-4910.html Mindat.org
  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 http://www.nature.com/nature/journal/v302/n5908/abs/302516a0.html

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