DETAILED STUDY OF “MONSMEDITE” SPECIMENS FROM THE ORIGINAL (1963) FIND, BAIA SPRIE, BAIA MARE ORE DISTRICT (ROMANIA)
Péter KOVÁCS-PÁLFFY1, József MUSKE2, Mária FÖLDVÁRI1, Péter KÓNYA1, Zoltán HOMONNAY3, Theodoros NTAFLOS4, Gábor PAPP5, Edit KIRÁLY1, István SAJÓ6, Veronika SZILÁGYI7 & Gábor BOZSÓ8
1 - Geological Institute of Hungary, H-1143, Budapest, Stefánia út 14, Hungary, e-mail: kovacs@mafi.hu, kope@mafi.hu, foldvari@mafi.hu
2 – 90443-Nürnberg, Knauerstrasse 9, Germany, e-mail: JMuske@arcor.de
3 - Department of Nuclear Chemistry, Eötvös Loránd University, H-1117, Budapest, Pázmány P. sétány 1/A, Hungary, e-mail: homonnay@ludens.elte.hu
4 - Department of Lithospheric Research, University of Vienna, Althahnstrasse 14, 1090-Wien, Austria, e-mail: theodoros.ntaflos@univie.ac.at
5 - Hungarian Natural History Museum, Department of Mineralogy and Petrology, Pf. 137, H-1431 Budapest, e-mail: pappmin@ludens.elte.hu
6 - Chemical Research Centre of the Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri út 59-67, Hungary, e-mail: sajo@chemres.hu
7 - Department of Nuclear Research Institute of Isotopes, Hungarian Academy of Sciences, Budapest, Hungary, e-mail: szilagyiv@iki.kfki.hu
8 – Department of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6721 Szeged, P.O. Box 951, e-mail: bozso.gabor@geo.u-szeged.hu
Reading time:
|
words
Download PDF document
Downloads: 6616
Abstract
“Monsmedite”, originally described as a unique, Tl(III)-rich mineral of Tl2O3·K2O·8SO3·15H2O formula from Baia Sprie, Romania, was reinvestigated using authentic specimens from the original finder of the mineral. “Monsmedite” is discredited as voltaite but the discreditation was based on specimens of unspecified origin, as the type material had been lost. Open questions related to the Tl-content and the limited scope of investigations done prior to the discreditation of “monsmedite” prompted this study. The presented results of the X-ray powder diffraction, thermoanalytical, IR-spectroscopic, Mössbauer spectroscopic, scanning electron microscopic and different kinds of chemical investigations confirmed that our “monsmedite” is Tl(I)-bearing voltaite but revealed a wide variability of Tl-content, reaching up to 7.49 wt% Tl2O. Empirical formula of “monsmedite” (from full chemical analysis of two samples) is:
K1.52–1.77Tl+0.23–0.33Fe2+1.79–1.91Mn2+0.84–2.16Zn2+0.51–0.64Mg2+0.06–2.03Fe3+2.63–2.82Al3+1.01–1.50(SO4)11.92–12.1615.52–17.72H2OKeywords:
- Monsmedite
- Tl-bearing
- voltaite
- Baia
- Sprie
- Romania
- XRPD
- thermal
- analysis
- IRS
- SEM-EDX
- Mö
- ssbauer 
- spectroscopy
- chemical
- analyses.
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of CJEES and/or the editor(s). CJEES and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.
© 2011 by the author(s). Licensee CJEES, Carpathian Association of Environment and Earth Sciences. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
How to cite
Péter KOVÁCS-PÁLFFY, József MUSKE, Mária FÖLDVÁRI, Péter KÓNYA, Zoltán HOMONNAY, Theodoros NTAFLOS, Gábor PAPP, Edit KIRÁLY1, István SAJÓ, Veronika SZILÁGYI & Gábor BOZSÓ (2011). DETAILED STUDY OF “MONSMEDITE” SPECIMENS FROM THE ORIGINAL (1963) FIND, BAIA SPRIE, BAIA MARE ORE DISTRICT (ROMANIA)
Loading...
Checking for open citations...