Title
Mineralogical and Mossbauerspectroscopic study of some strunzite varieties of the Silbergrube, Waidhaus, Oberpfalz, Germany
Author
Faculty/Department
Faculty of Applied Economics
Faculty of Sciences. Chemistry
Publication type
article
Publication
Stuttgart ,
Subject
Biology
Source (journal)
Neues Jahrbuch für Mineralogie: Monatshefte. - Stuttgart
Volume/pages
(1995) :1 , p. 11-25
ISSN
0028-3649
ISI
A1995QJ83200002
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
Two varieties, of ''strunzite'' are investigated namely ferrostrunzite and mangano-ferristrunzite from Waidhaus, Oberpfalz, Germany. The chemical relationships between the different varieties of ''strunzite'' are briefly discussed. Chemical composition, thermal behavior, X-ray data and IR spectra are presented. Transmission Fe-57 Mossbauer spectra for the mangano-ferristrunzite at 4.2 K (magnetically ordered state) and at room temperature (paramagnetic state) are presented. From the latter one, it is concluded that no detectable Fe2+ is present. The spectra were excellently fitted with three distinct, Lorentzian-shaped components in accordance with the compositional and structural features of the mineral. The Mn/Fe ratio is confirmed by the evaluated relative areas of the subspectra. The various hyperfine parameters are given and briefly discussed.
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