Abstract
The first representative of the eudialyte group with a primitive unit cell has been investigated by X-ray diffraction analysis, electron probe microanalysis, and IR spectroscopy. The mineral under study belongs to the system of sergevanite–raslakite–oneillite solid solutions; it is a low-symmetry variety of sergevanite, in which a high-valence zirconium cation compensates charge at the M2 site. The trigonal unit-cell parameters of the mineral are found to be a = 14.204(1) Å, c = 30.087(3) Å, and V = 5257.0(1) Å3; sp. gr. P3; the number of independent sites is 165. The crystal structure is refined to the final reliability factor R = 4.9% in the anisotropic approximation of atomic displacements using 5620 reflections with F > 3σ(F). The idealized formula of the mineral (Z = 3) is Na15Ca3(Mn,Fe)3Zr3[Na2Zr][Si26O72](O,OH)3Cl⋅Н2О.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
R. K. Rastsvetaeva, N. V. Chukanov, and S. M. Aksenov, Eudialyte-Group Minerals: Crystal Chemistry, Properties, Genesis (Izd-vo NGU, Nizhny Novgorod, 2012) [in Russian].
O. Johnsen, J. D. Grice, and R. A. Gault, Can. Mineral. 37, 865 (1999).
R. K. Rastsvetaeva, N. V. Chukanov, I. V. Pekov, et al., Minerals 10, 587 (2020). https://doi.org/10.3390/min10070587
R. K. Rastsvetaeva and N. V. Chukanov, Minerals 10, 720 (2020). https://doi.org/10.3390/min10080720
R. K. Rastsvetaeva, A. P. Khomyakov, and Yu. V. Nekrasov,) Crystallogr. Rep. 44 (5), 765 (1999).
R. K. Rastsvetaeva, N. V. Chukanov, and K. V. Van, Kristallografiya 65 (4), 562 (2020). https://doi.org/10.31857/S0023476120040190
V. I. Andrianov, Kristallografiya 32 (1), 228 (1987).
N. V. Chukanov, S. M. Aksenov, I. V. Pekov, et al., Can. Mineral. 58, 421 (2020). https://doi.org/10.3749/canmin.2000006
R. K. Rastsvetaeva, N. V. Chukanov, and D. V. Lisitsyn, Crystallogr. Rep. 66 (1), 112 (2021).
R. K. Rastsvetaeva and N. V. Chukanov, Crystallogr. Rep. 66 (1), 120 (2021).
R. K. Rastsvetaeva, N. V. Chukanov, and I. A. Verin, Dokl. Akad. Nauk 409 (6), 807 (2006).
S. M. Aksenov and R. K. Rastsvetaeva, Crystallogr. Rep. 58 (5), 671 (2013).
R. K. Rastsvetaeva, K. A. Rozenberg, I. V. Pekov, et al., Crystallogr. Rep. 51 (2), 205 (2006).
I. A. Ekimenkova, R. K. Rastsvetaeva, and N. V. Chukanov, Dokl. Akad. Nauk 374 (3), 352 (2000).
O. Johnsen, J. D. Grice, and R. A. Gault, Can. Mineral. 37, 1111 (1999).
R. K. Rastsvetaeva and A. P. Khomyakov, Crystallogr. Rep. 45 (4), 591 (2000).
L. N. Kogarko, Geokhimiya 54 (1), 4 (2016).
Funding
This study was supported by the Ministry of Science and Higher Education of the Russian Federation within the State assignment for the Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences in the part concerning the X-ray diffraction analysis and by the Russian Foundation for Basic Research in the parts concerning the crystallochemical analysis of zirconium-rich eudialyte-group minerals (project no. 18-29-12005) and the collection of mineral, analysis of its chemical composition, and diagnostics of associating minerals (project no. 18-29-12007_mk). The IR spectroscopy study was carried out within a State contract (State account no. АААА19-119092390076-7). This study was performed using equipment of the Shared Research Center of the Federal Scientific Research Centre “Crystallography and Photonics” with support by the Ministry of Science and Higher Education (project no. RFMEFI62119X0035).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by Yu. Sin’kov
Rights and permissions
About this article
Cite this article
Rastsvetaeva, R.K., Chukanov, N.V. Crystal Structure of the First Representative of the Eudialyte Group with Primitive Unit Cell. Crystallogr. Rep. 66, 940–948 (2021). https://doi.org/10.1134/S1063774521060304
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063774521060304