Locality: Palermo #1 Mine, N. Groton, NH
Specimen Size: 2 mm crystal
Field Collected: Walter Lane 1995-96, Cat. #2660
Catalog No.: A Gene Bearss collection specimen
Notes:
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 1.5 mm field of view. Red-brown octahedral phosphoferrite crystals on ludlamite.
Field Collected: ex. Bill Henderson
Catalog No.: A Joe Mulvey specimen, ex. Bill Henderson
Notes:
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 1.5 mm phosphoferrite crystal beside smaller 0.3 mm pale-brown, pseudo-octahedral, phosphoferrite crystal
Field Collected: Forrest Fogg - 1970's
Catalog No.: A Bob Wilken specimen
Notes: This is a very nice phosphoferrite specimen by mindat standards (2015).
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 7 mm mass of reddish-brown phosphoferrite-reddingite
Field Collected: From a tub of Palermo phosphate rocks gifted by Bob Whitmore
Catalog No.: u1877
Notes: Phosphoferrite is the Fe dominant member of the phosphoferrite-reddingite series. Reddingite is the Mn dominant member. Kryzhanovskite is the oxidized equivalent of phosphoferrite. All are reported from the Palermo Mine. Illustrations in Whitmore & Lawrence's book The Pegmatite Mines known as Palermo , include phosphoferrite (as pale brown pseudo octahedrons) and kryzhanovskite (as dark-brown pseudo-octahedrons). Then we also have landesite, a Fe deficient version of reddingite, that mindat.org reports from Palermo, citing Morrill as a reference... and who knows how that determination was made!
Phosphoferrite: (Fe2+,Mn2+)3(PO4)2 · 3H2O
Kryzhanovskite: (Fe3+,Mn2+)3(PO4)2(OH,H2O)3
Reddingite: (Mn2+,Fe2+)3(PO4)2 · 3H2O
Landesite: Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O
Semi-quantitative EDS can likely differentiate phosphoferrite from reddingite, but differentiating kryzhanskovite and landesite from phosphoferrite and reddingite would require a very skilled mineralogist/chemist.
Locality: Palermo Mine, N. Groton, NH
Specimen Size: pair of tiny, 0.2 mm, phosphoferrite-kryzhanovskite crystals
Field Collected: From a tub of Palermo phosphate rocks gifted by Bob Whitmore
Catalog No.: u1878
Notes:
Locality: Palermo Mine, N. Groton, NH
Specimen Size: pair of tiny, 0.3 mm, phosphoferrite-kryzhanovskite crystals
Field Collected: From a tub of Palermo phosphate rocks gifted by Bob Whitmore
Catalog No.: u1878
Notes: A small cubic form face is at the top.
Locality: Palermo Mine, Groton, NH
Specimen Size: 4 mm field of view
Field Collected: A Ray Meyers purchase of a S & J Cares specimen from a MMNE auction.
Catalog No.: Possible return to Ray Meyers after 2nd Raman look
Notes: Correianevesite gave the best match from a George Adleman Raman analysis.
Correianevesite is a member of the phosphoferrite group. Correianevesite requires 2 Mn, but phosphoferrite must be Fe dominant (requiring > 1.5 Fe, such that Fe+Mn = 3.)
Phosphoferrite: (Fe,Mn)3(PO4)2·3H2O
Correianevesite: Fe,Mn2(PO4)2·3H2O
A polished grain EDS analyses supported the Cares phosphoferrite identification with Fe > Mn.
The chemistry calculated from this analysis is: (Fe1.38,Mn1.05)P2O15 normalized for 2 P.
The specimen appears to have part of a triangular face of an octahedral form.... which correianevesite and phosphoferrite both have