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New data on melanos...
New data on melanostibite, Mn2Fe3+Sb5+O6
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- Musetti, Silvia (author)
- Università di Pisa, Italy
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- Biagioni, Cristian (author)
- Università di Pisa
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- Hålenius, Ulf (author)
- Naturhistoriska riksmuseet,Enheten för geovetenskap
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- Bonaccorsi, Elena (author)
- Università di Pisa
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- Zaccarini, Federica (author)
- Universiti Brunei Darussalam, Bandar Seri Begawan, Brunei Darussalam
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(creator_code:org_t)
- 2022-08-26
- 2022
- English.
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In: Mineralogical magazine. - : Mineralogical Society. - 0026-461X .- 1471-8022. ; 86:6, s. 903-909
- Related links:
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https://nrm.diva-por... (primary) (Raw object)
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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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- Following the identification of a new occurrence of melanostibite from the Apuan Alps, the crystal chemistry of this mineral has been re-examined using specimens from its type locality, Sjögruvan, Örebro County, Sweden, and from the new occurrence, the Scortico–Ravazzone Mn ore deposit, Apuan Alps, Tuscany, Italy. Both specimens were examined through electron microprobe analysis, micro-Raman spectroscopy and single-crystal X-ray diffraction data; Mössbauer spectroscopy was used for the Swedish specimen. Electron microprobe data indicate a close to ideal composition Mn2Fe3+Sb5+O6 for both samples, whereas Mössbauer spectroscopy confirmed the trivalent oxidation state of Fe. Single-crystal X-ray diffraction for the Swedish and Italian specimens points to the acentric nature of melanostibite, space group R3. Refined unit-cell parameters of melanostibite from Scortico–Ravazzone and Sjögruvan are a = 5.2351(3), c = 14.3645(8) Å, V = 340.93(4) Å3, and a = 5.2314(2), c = 14.3518(8) Å, V = 340.15(3) Å3, respectively. Melanostibite is an homeotypic derivative of pyrophanite.
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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