Abstract
The crystal structure of Li2MgSiO4 was established by single-crystal X-ray diffraction analysis. The crystals are monoclinic, a = 4.9924(7) Å, b = 10.681(2) Å, c = 6.2889(5) Å, β = 90.46(1)°, Z = 4, sp. gr. P21/n, V = 335.54 Å3, R = 0.062. In a Li2MgSiO4 crystal, four types of independent T(1–4) tetrahedra share vertices to form a three-dimensional framework. Three of these tetrahedra are occupied simultaneously by Li and Mg cations, which corresponds to the crystallochemical formula (Li0.98Mg0.02)(Li0.80Mg0.20) · (Li0.22Mg0.78)SiO4. In slightly distorted SiO4 tetrahedra denoted as T(1), the average Si-O distance is 1.635(2) Å. The distortions of other tetrahedra and the average (Li x Mg1 − x )-O distances increase with an increase in lithium content. These distances in the T(2), T(3), and T(4) tetrahedra are 1.955(2), 1.971(4), and 2.019(6) Å, respectively. The structure of the new compound is compared with the crystal structures of other Li2 M 2+SiO4 compounds and the luminescence spectra of Cr4+: Li2MgSiO4.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
V. V. Dozmarov, V. N. Protopopov, L. D. Iskhakova, and E. M. Dianov, in Proceedings of the International Conference on Coherent and Nonlinear Optics, Moscow, 1998, p. 39.
V. Petrićević, A. B. Bykov, A. Seas, et al., in Abstracts of the Conference on Lasers and Electrooptics, 1997, p. 489.
V. V. Dozmarov, L. D. Iskhakova, Yu. A. Velikodnyi, et al., Kristallografiya 45(6), 1146 (2000) [Crystallogr. Rep. 45, 1059 (2000)].
B. Monnaye, Rev. Chim. Miner. 13, 422 (1976).
C. Anino, J. Thery, and D. Vivien, Opt. Mater. 8, 121 (1997).
Enraf-Nonius CAD-4 Software. Version 5.0 (Enraf-Nonius, Delft, The Netherlands, 1989).
L. J. Farrugia, WinGX98: X-ray Crystallographic Programs for Windows (University of Glasgow, Glasgow, 1998).
Shu-cheng Yu, D. K. Smith, and S. B. Asterman, Am. Mineral. 63, 1241 (1978).
G. M. Sheldrick, SHELX97: Program for the Solution and Refinement of Crystal Structures (University of Göttingen, Göttingen, 1997).
K. A. Soubbotin, E. V. Zharikov, L. D. Iskhakova, and S. V. Lavrishchev, Kristallografiya 46(6), 1115 (2001) [Crystallogr. Rep. 46, 1030 (2001)].
J. R. Smyth and R. M. Hazen, Am. Mineral. 58, 588 (1973).
V. A. Efremov, Doctoral Dissertation in Chemistry (Moscow, 1993).
A. R. West, PDF, Card Nos. 24-676-24-686, 34-1231; 24-629-24-637.
A. R. West and F. P. Glasser, J. Solid State Chem. 4, 20 (1972).
A. R. West, Z. Kristallogr. 141, 422 (1975).
J. A. Gard and A. R. West, J. Solid State Chem. 7, 422 (1973).
K. A. Wilhelm, Ark. Kemi 26, 157 (1967).
V. V. Zuev, Constitution and Properties of Minerals (Nauka, Leningrad, 1990).
O. N. Gorshkov, E. M. Dianov, N. B. Zvonkov, et al., Pis’ma Zh. Tekh. Fiz. 27(17), 1 (2001) [Tech. Phys. Lett. 27, 709 (2001)].
Author information
Authors and Affiliations
Additional information
__________
Translated from Kristallografiya, Vol. 48, No. 1, 2003, pp. 44–48.
Original Russian Text Copyright © 2003 by Iskhakova, Rybakov.
Rights and permissions
About this article
Cite this article
Iskhakova, L.D., Rybakov, V.B. Crystal structure of Li2MgSiO4 . Crystallogr. Rep. 48, 39–43 (2003). https://doi.org/10.1134/1.1541740
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1541740