Mckelveyite group minerals – Part 1
- Author(s)
- Inna Lykova, Ralph Rowe, Glenn Poirier, Gerald Giester, Kelsie Ojaste, Henrik Friis
- Abstract
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)6 . 3H(2)O, where A= Na, Ca, Y, and Zr and B= Sr, 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)6 . 3H(2)O, 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 R-1= 0.055 for 3366 reflections with I > 2 sigma(I). Donnayite-(Y) is shown to have a weloganite-type structure confirming its place in the mckelveyite group.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- Canadian Museum of Nature, University of Ottawa, University of Oslo
- Journal
- European Journal of Mineralogy
- Volume
- 35
- Pages
- 133-142
- No. of pages
- 10
- ISSN
- 0935-1221
- DOI
- https://doi.org/10.5194/ejm-35-133-2023
- Publication date
- 02-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105116 Mineralogy, 105113 Crystallography
- Keywords
- ASJC Scopus subject areas
- Geochemistry and Petrology
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/f94e38a3-277b-4a54-ba3f-3bdec13f3161