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NEW DATA ABOUT ISOMORPHISM IN THE EUDIALYTE GROUP MINERALS. XIII. CRYSTAL STRUCTURE OF "FERROFEKLICHEVITE" – POTENTIALLY NEW HIGH CALCIUM MINERAL FROM KHIBINY MASSIF
- Authors: Rastsvetaeva R.K1, Gridchina V.M1, Chukanov N.V2, Aksenov S.M3,4
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Affiliations:
- Shubnikov Institute of Crystallography of the Kurchatov Complex Crystallography and Photonics of the NRC "Kurchatov Institute"
- FRC of Problems of Chemical Physics and Medicinal Chemistry, RAS
- Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Center, Russian Academy of Sciences
- Geological Institute, Kola Science Center, Russian Academy of Sciences
- Issue: Vol 70, No 6 (2025)
- Pages: 963-968
- Section: СТРУКТУРА НЕОРГАНИЧЕСКИХ СОЕДИНЕНИЙ
- URL: https://journal-vniispk.ru/0023-4761/article/view/356305
- DOI: https://doi.org/10.7868/S3034551025060105
- ID: 356305
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Abstract
The crystal structure of a high-calcium eudialyte group mineral from alkaline rocks of the Khibiny massif has been studied. Trigonal cell parameters: a = 14.221(1), c = 30.04(1) Å, V = 5261.3(4) Å3, space group R3m. The structure has been refined to a final divergence factor of R = 2.8% in the isotropic approximation of atomic displacements using 1714 reflections with F > 3σ(F). The studied mineral is similar in chemical composition to feklichevite, from which it differs in the dominance of divalent iron, as well as a lower calcium content and a higher manganese content. The structural features of representatives of the eudialyte group with an increased calcium content from three alkaline massifs are discussed.
About the authors
R. K Rastsvetaeva
Shubnikov Institute of Crystallography of the Kurchatov Complex Crystallography and Photonics of the NRC "Kurchatov Institute"
Email: rast.crys@gmail.com
Moscow, Russia
V. M Gridchina
Shubnikov Institute of Crystallography of the Kurchatov Complex Crystallography and Photonics of the NRC "Kurchatov Institute"
Email: rast.crys@gmail.com
Moscow, Russia
N. V Chukanov
FRC of Problems of Chemical Physics and Medicinal Chemistry, RAS
Email: rast.crys@gmail.com
Chernogolovka, Russia
S. M Aksenov
Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Center, Russian Academy of Sciences; Geological Institute, Kola Science Center, Russian Academy of Sciences
Author for correspondence.
Email: rast.crys@gmail.com
Apatity, Russia; Apatity, Russia
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