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Sökning: onr:"swepub:oai:DiVA.org:nrm-2819" > Experimental cation...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03422naa a2200349 4500 | |
| 001 | oai:DiVA.org:nrm-2819 | |
| 003 | SwePub | |
| 008 | 180716s2018 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-28192 URI |
| 024 | 7 | a https://doi.org/10.1007/s00269-018-0947-02 DOI |
| 040 | a (SwePub)nrm | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Bosi, Ferdinandou Sapienza Università di Roma, Italy4 aut |
| 245 | 1 0 | a Experimental cation redistribution in the tourmaline lucchesiite, CaFe2+3Al6(Si6O18)(BO3)3(OH)3O |
| 264 | c 2018-02-08 | |
| 264 | 1 | b Springer Science and Business Media LLC,c 2018 |
| 338 | a print2 rdacarrier | |
| 520 | a Natural Mg-rich lucchesiite was thermally treated in air and hydrogen atmosphere up to 800 °C to study potential changes in Fe-, Mg- and Al ordering over the octahedrally coordinated Y- and Z -sites, and to explore possible applications to intracrystalline geothermometry based on tourmaline. Overall, the experimental data (structural refinement, Mössbauer, infrared and optical absorption spectroscopy) show that thermal treatment of lucchesiite results in an increase of Fetot contents at Z balanced by an increase of Mg and Al at Y . This process is accompanied by a significant deprotonation of the O3 anion site. The Fe order–disorder reaction depends more on temperature, than on redox conditions. During heat treatment in H2 ,reduction of Fe3+ to Fe2+ was not observed despite strongly reducing conditions, indicating that the fO2 conditions do not exclusively control the Fe oxidation state at the present experimental conditions. On the basis of this and previous studies, the intersite order–disorder process induced by thermal treatment indicates that Fe redistribution is an important factor for Fe–Mg–Al-exchange and is significant at temperatures around 800 °C. As a result, Fe–Mg–Al intersite order–disorder is sensitive to temperature variations, whereas geothermometers based solely on Mg–Al order–disorder appear insensitive and involve large uncertainties. The presented findings are important for interpretation of the post-crystallization history of both tourmaline and tourmaline host rocks, and indicate that successful tourmaline geothermometers may be developed by thermal calibration of the Fe-Mg–Al order–disorder reaction. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geokemi0 (SwePub)105062 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geochemistry0 (SwePub)105062 hsv//eng |
| 653 | a The changing Earth | |
| 653 | a Den föränderliga jorden | |
| 700 | 1 | a Skogby, Henriku Naturhistoriska riksmuseet,Enheten för geovetenskap4 aut0 (Swepub:nrm)henrskog |
| 700 | 1 | a Hålenius, Ulfu Naturhistoriska riksmuseet,Enheten för geovetenskap4 aut0 (Swepub:nrm)ulfhalen |
| 700 | 1 | a Ciriotti, Marcou Associazione Micromineralogica Italiana,Torino, Italy4 aut |
| 710 | 2 | a Sapienza Università di Roma, Italyb Enheten för geovetenskap4 org |
| 773 | 0 | t Physics and chemistry of mineralsd : Springer Science and Business Media LLCg 45:7, s. 621-632q 45:7<621-632x 0342-1791x 1432-2021 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2819 |
| 856 | 4 8 | u https://doi.org/10.1007/s00269-018-0947-0 |
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