Mckelveyite group minerals – Part 1
- Autor(en)
- Inna Lykova, Ralph Rowe, Glenn Poirier, Gerald Giester, Kelsie Ojaste, Henrik Friis
- Abstrakt
The mckelveyite group consisting of seven carbonate minerals - mckelveyite-(Y), ewaldite, weloganite, donnayite-(Y), alicewilsonite-(YCe), alicewilsonite-(YLa), and bainbridgeite-(YCe) - is formally established. The general formula of the minerals is A3B3(CO3)6gĝ ...g3H2O, where ACombining double low linegNa, Ca, Y, and Zr and BCombining double low linegSr, Ba, Ce, and La. Different order-disorder modifications are known resulting in triclinic, monoclinic, hexagonal, and trigonal minerals with essentially the same structure. Re-examination of donnayite-(Y) type specimens shows that the original description contains data collected on two different species: donnayite-(Y) and alicewilsonite-(YCe). Donnayite-(Y), NaCaSr3Y(CO3)6gĝ ...g3H2O, was found in only one specimen out of seven - CMNMC 39396 - housed at the Canadian Museum of Nature, Ottawa. This specimen becomes the holotype of donnayite-(Y). The crystal structure of donnayite-(Y) was solved and refined to R1Combining double low lineg0.055 for 3366 reflections with I>2σ(I). Donnayite-(Y) is shown to have a weloganite-type structure confirming its place in the mckelveyite group.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Canadian Museum of Nature, University of Ottawa, University of Oslo
- Journal
- European Journal of Mineralogy
- Band
- 35
- Seiten
- 133-142
- Anzahl der Seiten
- 10
- ISSN
- 0935-1221
- DOI
- https://doi.org/10.5194/ejm-35-133-2023
- Publikationsdatum
- 02-2023
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105116 Mineralogie, 105113 Kristallographie
- ASJC Scopus Sachgebiete
- Geochemistry and Petrology
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/f94e38a3-277b-4a54-ba3f-3bdec13f3161