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Cu- and Mn-bearing tourmalines from Brazil and Mozambique: crystal structures, chemistry and correlations
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-127296
- Cu- and Mn-bearing tourmalines from Brazil and Mozambique were characterised chemically (EMPA and LA-ICP-MS) and by X-ray single-crystal structure refinement. All these samples are rich in Al, Li and F (fluor-elbaite) and contain significant amounts of CuO (up to ~1.8 wt%) and MnO (up to ~3.5 wt%). Structurally investigated samples show a pronounced positive correlation between the <Y-O> distances and the (Li + Mn\(^{2+}\) + Cu + Fe\(^{2+}\)) content (apfu) at this site with R\(^2\) = 0.90. An excellent negative correlation exists between theCu- and Mn-bearing tourmalines from Brazil and Mozambique were characterised chemically (EMPA and LA-ICP-MS) and by X-ray single-crystal structure refinement. All these samples are rich in Al, Li and F (fluor-elbaite) and contain significant amounts of CuO (up to ~1.8 wt%) and MnO (up to ~3.5 wt%). Structurally investigated samples show a pronounced positive correlation between the <Y-O> distances and the (Li + Mn\(^{2+}\) + Cu + Fe\(^{2+}\)) content (apfu) at this site with R\(^2\) = 0.90. An excellent negative correlation exists between the <Y-O> distances and the Al\(_2\)O\(_3\) content (R\(^2\) = 0.94). The samples at each locality generally show a strong negative correlation between the X-site vacancies and the (MnO + FeO) content. The Mn content in these tourmalines depends on the availability of Mn, on the formation temperature, as well as on stereochemical constraints. Because of a very weak correlation between MnO and CuO we believe that the Cu content in tourmaline is essentially dependent on the availability of Cu and on stereochemical constraints.…
Autor(en): | Andreas Ertl, Gerald Giester, Ulrich Schüssler, Helene Brätz, Martin Okrusch, Ekkehart Tillmanns, Hermann Bank |
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URN: | urn:nbn:de:bvb:20-opus-127296 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Philosophische Fakultät (Histor., philolog., Kultur- und geograph. Wissensch.) / Institut für Geographie und Geologie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Mineralogy and Petrology |
Erscheinungsjahr: | 2013 |
Band / Jahrgang: | 107 |
Heft / Ausgabe: | 2 |
Seitenangabe: | 265-279 |
Originalveröffentlichung / Quelle: | Mineralogy and Petrology (2013) 107:265–279 DOI 10.1007/s00710-012-0234-6 |
DOI: | https://doi.org/10.1007/s00710-012-0234-6 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 549 Mineralogie |
Freie Schlagwort(e): | Brazil; Mozambique; mineralogy |
Datum der Freischaltung: | 07.09.2016 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |