Abstract
The distribution of Cu2+ impurities in ZnSeO4·6H2O and Na2Cd(SO4)2·2H2O crystals was investigated by electron paramagnetic resonance. The tangential selectivity by sectors in pyramid growth was revealed. Dissymmetrization, i.e., decrease of point group symmetry, is explained by tangential selectivity occupying impurities and formation defects. An analysis by group theory is presented to explain dissymmetrization of crystals. The connection between the distribution of point defects in a crystal and the growth process is discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Barry, T.I., McNamara, P., Moore, W.J.: Paramagnetic resonance and optical properties of amethyst. J. Chem. Phys. 42, 2599–2606 (1965)
Geschwind, S., Remeika, J.P.: Paramagnetic resonance of Gd3+ in Al2O3. Phys. Rev. 122, 757–761 (1961)
Hall, M.: The theory of groups. New York: The Macmillan Company 1959, fifth printing 1964
Kurosh, A.G.: The theory of groups (in Russian). Moscow: Nauka 1967
Lemmlein, G.G.: The crystal morphology and crystal habit (in Russian). Moscow: Nauka 1973
Marshall, S.A., Reinberg, A.R.: Paramagnetic resonance absorption spectrum of trivalent ion in single calcite. Phys. Rev. 132, 134–139 (1963)
Nizamutdinov, N.M., Bulka, G.R., Gajnulla, N.M., Vinokurov, V.M.: The symmetry of distribution of defects in regular point systems and properties of directions in EPR spectra in crystals. In: The physical properties of minerals and rocks. Vinokurov, V.M. (ed.). Kazan State University Press, 1976, pp. 3–48
Nizamutdinov, N.M., Bulka, G.R., Hasanova, N.M., Shchepkin, V.D., Vinokurov, V.M.: Scheme for elimination of orientational degenerations of positions in crystal structures, dissymmetrization of crystals and its manifestation in EPR spectra of Cu2+ ions in ZnSeO4·6H2O crystals (in Russian). Kristallografiya 22, 775–783 (1977)
Nizamutdinov, N.M., Bulka, G.R., Krutikov, V.F., Stepanov, V.G., Vinokurov, V.M.: The transitive systems of substitution groups of crystallographic groups and its application in investigation of crystals by EPR methods (in Russian). Report deposited in VINITI N3264-76, 48 pp., Abstract No. 6d787, Ref. Zh. Fiz. (1977)
Shubnikov, A.V.: Selected papers on crystallography (in Russian). Moscow: Nauka 1975
Tsinober, L.I., Samoilovitsch, M.I., Gordienko, L.A., Chentsova, L.G.: Investigation of the anomalous pleochroism of a synthetic quartz (crystal) with smoky color. Kristallografiya 12, 65–69 (1967)
Vinokurov, V.M., Bulka, G.R., Vedenin, S.V., Zachartschenko, T.A., Hasanova, N.M., Nizamutdinov, N.M.: Investigation of dissymmetrization by growth and of anisotropy of transition layer of crystals by radiospectroscopy methods. The sectors of selectivity in the crystals Na2Cd(SO4)2·2H2O under EPR spectra of Cu2+, Gd3+, V4+ ions in process of growth and anisotropy (in Russian). Report deposited in VINITI N615-77, 48 pp., Abstract No 6d787, Ref. Zh. Fiz. (1977a)
Vinokurov, V.M., Bulka, G.R., Nizamutdinov, N.M., Hasanova, N.M.: Independent tangential selectivity in the growth of crystals (in Russian). Dokl. Akad. Nauk SSSR 237, 1388–1391 (1977b)
Vinokurov, V.M., Nizamutdinov, N.M., Bulka, G.R., Gajnullina, N.M.: Isomorphism and symmetry distribution of point defects in crystals (in Russian). In: Cristallchemical aspects of isomorphism, Povarennich, A.S. (ed.). Kiev: Naukova Dumka 1976, pp. 77–92
Winchell, A.N., Winchell, H.: Elements of optical mineralogy, New York: John Wiley and Son 1951
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bulka, G.R., Vinokurov, V.M., Nizamutdinov, N.M. et al. Dissymmetrization of crystals: Theory and experiment. Phys Chem Minerals 6, 283–293 (1980). https://doi.org/10.1007/BF00307618
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00307618