Mn-rich graftonite, ferrisicklerite, stanekite and Mn-rich vivianite in a granitic pegmatite at Soe' Valley, central Alps, Italy. (Articolo in rivista)

Type
Label
  • Mn-rich graftonite, ferrisicklerite, stanekite and Mn-rich vivianite in a granitic pegmatite at Soe' Valley, central Alps, Italy. (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1180/minmag.2007.071.5.579 (literal)
Alternative label
  • Guastoni A.; Nestola F.; Mazzoleni G.; Vignola P. (2008)
    Mn-rich graftonite, ferrisicklerite, stanekite and Mn-rich vivianite in a granitic pegmatite at Soe' Valley, central Alps, Italy.
    in Mineralogical magazine (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Guastoni A.; Nestola F.; Mazzoleni G.; Vignola P. (literal)
Pagina inizio
  • 579 (literal)
Pagina fine
  • 585 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 71 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • Il vol. 71 è datato 2007 ma è uscito nel 2008 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Geoscienze, Universita` degli Studi di Padova, Via Giotto 1, I-35137 Padova, Italy Istituto di Geoscienze e Georisorse, CNR Sezione di Padova, Via Giotto 1, I-35137 Padova, Italy Stazione Valchiavenna per lo Studio dell'Ambiente Alpino, Via dei Cappuccini, I-23022 Chiavenna, Italy CNR-Istituto per la dinamica dei processi ambientali, Via Mario Bianco 9, I-20131 Milano, Italy (literal)
Titolo
  • Mn-rich graftonite, ferrisicklerite, stanekite and Mn-rich vivianite in a granitic pegmatite at Soe' Valley, central Alps, Italy. (literal)
Abstract
  • Mn-rich graftonite, (Ca,Mn2+)(Fe2+,Mn2+)2(PO4)2, ferrisicklerite, Li1?x(Fe3+,Mn2+)PO4, manganoan apatite, (Ca,Mn2+,Fe2+Mg)(PO4)3Cl, stane? kite, Fe3+Mn2+O(PO4) and Mn-rich vivianite, (Fe2+)3(PO4)2?8H2O, occurring in a granitic pegmatite at Soe` Valley (central Alps, Italy) were characterized by powder and single-crystal X-ray diffraction (XRD) and electron microprobe analyses. Geochemically, the Mn-rich graftonite phases are poorly evolved Fe/Mn-phosphates of rare-earth elements-lithium (REE-Li) granitic pegmatites. The assemblage Mn-rich graftonite + ferrisicklerite + stane?kite has rarely beendocumen ted in pegmatites. Inthe Soe` Valley pegmatite, ferrisicklerite forms exsolution lamellae with Mn-rich graftonite associated with manganoan apatite and stane?kite. Graftonite is associated with Mn-rich vivianite. Powder and single-crystal XRD data indicate that the unit-cell volume of graftonite increases as a function of Mn2+ content. Stane?kite shows a distinctly smaller unit-cell volume with respect to previously reported stane?kites, probably due to reduced Mn2+. Vivianite with significant Mn2+ has a unit-cell volume similar to nearly Mn-free vivianite. The formation of Mn-rich graftonite and manganoan apatite is related to destabilization of Mn-rich almandine and biotite during pegmatite formation. Ferrisicklerite forms exsolution lamellae along the 010 cleavage planes of Mn-rich graftonite, whereas stane?kite forms by alterationof ferrisicklerite and Mn-rich vivianite due to circulation of late-stage hydrothermal fluids. (literal)
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