http://www.cnr.it/ontology/cnr/individuo/prodotto/ID260841

Topotactic formation of ferrisicklerite from natural triphylite under hydrothermal conditions. (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Topotactic formation of ferrisicklerite from natural triphylite under hydrothermal conditions. (Articolo in rivista) (literal)

Anno

2013-01-01T00:00:00+01:00 (literal)

Alternative label

Schmid-Beurmann P. [1], Ottolini L. [2], Hatert F. [3], Geisler T. [4], Huyskens M. [1], Kahlenberg V. [5] (2013)
Topotactic formation of ferrisicklerite from natural triphylite under hydrothermal conditions.
in Mineralogy and petrology (Internet); Springer Wien, Wien (Austria)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Schmid-Beurmann P. [1], Ottolini L. [2], Hatert F. [3], Geisler T. [4], Huyskens M. [1], Kahlenberg V. [5] (literal)

Pagina inizio

501 (literal)

Pagina fine

515 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.springerlink.com/openurl.asp?genre=journal&issn=0930-0708 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

107 (literal)

Rivista

Mineralogy and petrology (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

4 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

[1] Institut für Mineralogie, Universität Münster, Münster, Germany [2] C.N.R.- Istituto di Geoscienze e Georisorse (IGG), Pavia, Italy [3] Laboratoire de Minéralogie, Département de Géologie, Université de Liège, Belgium [4] Universität Bonn, Steinmann-Institut für Geologie, Mineralogie und Paläontologie, Bonn, Germany [5] Universität Innsbruck, Institut für Mineralogie und Petrographie, Innsbruck, Austria (literal)

Titolo

Topotactic formation of ferrisicklerite from natural triphylite under hydrothermal conditions. (literal)

Abstract

The topotactic oxidation and delithiation reaction from triphylite, Li(Fe,Mn)PO4, leading to ferrisicklerite, Li<1(Fe3+,Mn2+)PO4, was investigated under hydrothermal conditions. A cuboid cut from a triphylite single-crystal (Palermo Mine, New Hampshire, USA) with the composition Li0.93(3)(Fe2+ 0.733(6),Fe3+ 0.015(1),Mn2+ 0.210(4),Mg0.063(2))1.021(8)P1.00(2)O4 in addition with ground bulk material were treated with KMnO4 and 30 % H2O2(aq) as oxidizing agent in a 0.1 N hydrochloric acid solution in the temperature range between 60 and 200 °C. At 120 °C a rim of 0.1 mm thickness of ferrisicklerite had formed around the core of unreacted triphylite. The sharp reaction boundary was clearly visible, due to the reddish brown absorption colors of ferrisicklerite, compared to colorless triphylite. Using single-crystal X-ray diffraction (XRD), secondary ion mass spectrometry (SIMS), electron probe micro-analysis (EPMA) and 57Fe-Mössbauer spectroscopy the product ferrisicklerite was characterized and its composition determined as Li0.30(7)(Fe2+ 0.049(1)Fe3+ 0.65(2)Mn2+ 0.218(5)Mg0.062(2))0.98(1)P1.01(3)O4, with unit cell parameters a = 4.795(1), b = 9.992(4), and c = 5.886(2) Å. EPMA investigations across the reaction boundary showed no changes in the concentrations of Fe, Mn, Mg, and P. In contrast, SIMS measurements clearly proved the delithiated state of the ferrisicklerite product. Polarization microscopy revealed that the orientation of the ferrisicklerite rim was the same as that of the original triphylite single-crystal, confirming the strictly topotactic character of the reaction. (literal)

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