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Gabrielsonite revis...
Gabrielsonite revisited: crystal-structure determination and redefinition of chemical formula
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- Perchiazzi, Natale (author)
- Università di Pisa, Italy
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- Hålenius, Ulf (author)
- Naturhistoriska riksmuseet,Enheten för geovetenskap
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- Vignola, Pietro (author)
- CNR, Milano, Italy
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- Demitri, Nicola (author)
- ELETTRA, Trieste, Italy
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(creator_code:org_t)
- Schweizerbart, 2018
- 2018
- English.
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In: European journal of mineralogy. - : Schweizerbart. - 0935-1221 .- 1617-4011. ; 30:6, s. 1173-1180
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- A reinvestigation of gabrielsonite from the holotype specimen from Långban, central Sweden, using single-crystal synchrotron X-ray diffraction, electron-microprobe techniques and Fourier-transform infrared (FTIR) spectroscopy, Raman and Mössbauer spectroscopies show that the mineral is an anhydrous Fe3+-bearing arsenite and not a hydrous Fe2+-bearing arsenate, as originally proposed. The revised ideal chemical formula of gabrielsonite is PbFe3(As3+O3)O. The mineral is related to the descloizite supergroup, but it differs through the valencies of the non-Pb cations Fe (M3+ vs. M2+) and As (3+ vs. 4+) and through lower coordination of Pb (4 vs. 7–8) and As (3 vs. 4). The redefinition of gabrielsonite (proposal 17-G) has been approved by the Commission on New Minerals, Nomenclature and Classification (CNMNC) of the International Mineralogical Association.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Keyword
- The changing Earth
- Den föränderliga jorden
Publication and Content Type
- ref (subject category)
- art (subject category)
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