Titre du document / Document title

Metavivianite an intermediate mineral phase between vivianite, and ferro/ferristrunzite: a Raman spectroscopic study

Auteur(s) / Author(s)

FROST Ray L. ; WEIER Matt ; LYON William G. ;

Résumé / Abstract

A comparison between the minerals vivianite, metavivianite, and ferro/ferristrunzite is made using Raman spectroscopy. The Raman spectrum of metavivianite is broad and more closely resembles the spectrum of ferro/ferristrunzite than vivianite. This is not unexpected since both minerals are triclinic. Metavivianite is characterised by a broad profile in the hydroxyl stretching region with bands observed at 3368 and 3133 cm_-1. The width of the bands indicates the structure of metavivianite is disordered. In the PO stretching region bands are observed at 1123, 1060, 1005 and 958 cm_-1 and are assigned to the stretching modes. Vivianites with partial oxidation are characterised by a sharp OH stretching band observed around 3480 cm₀₁ in the Raman spectrum. It is proposed that metavivianite is a transitional oxidation phase between the vivianite and the ferro/ferristrunzite end members.

Revue / Journal Title

Neues Jahrbuch für Mineralogie Monatshefte   ISSN 0028-3649   CODEN NJMMAW 

Source / Source

2004, n^o5, pp. 228-240 [13 page(s) (article)]

Langue / Language

Anglais
Revue : Multilingue

Editeur / Publisher

Schweizerbart'sche, Stuttgart, ALLEMAGNE  (1950-2004) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 924 A, 35400011451581.0040