Ferroaxinite (Axinite-(Fe)), a calcium iron aluminum boron silicate hydroxide mineral of the axinite group, is rare at Franklin. Palache (1935) reported it as crystals from the Gooseberry Mine, one of a string of magnetite deposits just south of the Franklin Mine; this material has not been restudied. At the Franklin mine, ferroaxinite is found in the Palmer Shaft area as euhedral, light-brown to medium brown crystals associated with hedenbergite, epidote, end-member zircon, andradite, pyrite, and fluorapophyllite. Partial microprobe analysis of these crystals confirms they are ferroaxinite, with 4 wt. % MnO, 1 wt. % MgO, and no appreciable zinc. (Dunn, 1995)

 Location Found: Franklin
 Mineral Note: Named axinit in 1797 by Rene Just HaĆ¼y. Renamed ferroaxinite by Waldemar T. Schaller in 1909 for iron dominance in the formula. Renamed with suffix "-Fe" by IMA in 2008.
 Formula: Ca2Fe2+Al2BSi4O15OH
 Essential Elements: Aluminum, Boron, Calcium, Hydrogen, Iron, Oxygen, Silicon
 All Elements in Formula: Aluminum, Boron, Calcium, Hydrogen, Iron, Oxygen, Silicon
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
 To find out more about this mineral at minDat's website, follow this link   Axinite-(Fe)

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.409. 'Ferroaxinite'

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.43

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 38, Combined Issue 1997, pg. 30Ferroaxinite and Heulandite From the Lime Crest Quarry: New Minerals for the Locality
View IssueV. 30, No. 1 - Spring 1989, pg. 8The Epidote-Pyroxene-Fluorapophyllite Assemblage in the Franklin Mine at Franklin, New Jersey, Philip P. Betancourt, Ferroaxinite (small description)
View IssueV. 13, No. 2 - August 1972, pg. 11The Fluorescent Minerals of Franklin/Ogdensburg Area by Frank Z. Edwards - Axinite (Fluorescent Info)
View IssueV. 13, No. 1 - February 1972, pg. 10Franklin Mineral Notes - Axinite
View IssueV. 10, No. 1 - February 1969, pg. 10Harvard Research on Franklin Minerals - Axinites
View IssueV. 6, No. 1 - February 1965, pg. 7Axinite
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