Locality: Turner Mine, Marlow, NH
Specimen Size: 6 x 6 x 3 cm specimen with pink-red zones of glassy triploidite. Two views.
Field Collected: Unknown
Catalog No.: 1961
Notes: Ray Meyers purchased this specimen as "Hureaulite." A XRD analysis confirmed this mineral is triploidite with excellent correlation. A XRF analysis confirmed a Mn > Fe phosphate species. Triploidite has not previously been reported from the Turner Mine. A label stuck to the specimen bottom indicates a 2003 collecting date.
Locality: Turner Mine, Marlow, NH
Specimen Size: 3.1 x 2.2 cm specimen, two views.
Field Collected: A Friend - 2004 (#8725)
Catalog No.: 2100
Notes: The initial visual identification of this mineral was hureaulite. The 2015 XRD analysis of the pink-red specimen # 1961, above, suggested this might also be triploidite.
Through the effort of Ray Meyers, this specimen was acquired for my NH collection. This provided an opportunity for me to do a polished grain EDS analysis , BC307.
The chemistry imputed from this analysis is: Mn5.75P4.0O8.2 , normalized for 4 P.
This approximate 5:4 Mn:P ratio close to that of hureaulite, Mn2+5(PO3OH)2(PO4)2·4H2O . This prismatic crystal form is unlike that of hureaulite.
For reference, triploidite chemistry is: (Mn2+,Fe2+)2(PO4)(OH) .
The matrix is thought to be lithiophilite.
A Raman spectrum of the matrix by George Adleman had about equal match for lithiophilite and triphylite, but as seen as the references on this plot, these two Raman spectra are essentially the same.
Locality: Turner Mine, Marlow, NH
Specimen Size: 6.6 x 4.2 cm specimen
Field Collected: A Friend
Catalog No.:
Notes: See ID notes for #2100, above.
Locality: Turner Mine, Marlow, NH
Specimen Size: Two 3.4 cm samples with massive, embedded, triploidite
Field Collected: A Friend
Catalog No.:
Notes: See ID notes for #2100, above.