PHLOSPHOFERRITE Gallery Return to Phosphoferrite page. Click on image for larger view | |
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Species: PHOSPHOFERRITE 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: |
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Species: PHOSPHOFERRITE 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: |
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Species: PHOSPHOFERRITE 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). |
Species: PHOSPHOFERRITE-KRYZHANOVSKITE-REDDINGITE 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. |
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Species: PHOSPHOFERRITE-KRYZHANOVSKITE-REDDINGITE 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: |
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Species: PHOSPHOFERRITE-KRYZHANOVSKITE-REDDINGITE 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. |
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Species: PHOSPHOFERRITE 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 |