Ferrohortonolite is a mineral variety in the olivine series composed of 70% to 90% fayalite and 30% to 10% forsterite or Fe/(Fe+Mg) ratio of 0.7 to 0.9.[1] It is from the obsolete hortonolite terminology for the olivine series.[1]

Ferrohortonolite
General
CategoryMineral
Formula
(repeating unit)
Fe/(Fe+Mg)

It has been reported from Mount Gillies, Queensland, Australia; the Ilimaussaq complex of west Greenland; Pantelleria Island, Sicily; and from Choc village on Saint Lucia.[1]

References

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  1. ^ a b c "Ferrohortonolite". www.mindat.org.
  • U.S. Bureau of Mines (1996). Dictionary of Mining, Mineral, and Related Terms.