Abstract
Nuclear gamma ray (Mössbauer) spectroscopy (ngr) was used to examine 114 samples of tourmaline from different deposits. The absorption curve shape of the ngr spectra was found to depend not only on tourmaline composition, but also on the character of cation distribution in the crystal structure. The complex superpositional nature of the spectra corresponds to a statistical distribution of iron ions, whereas a minimum number of doublets is observed in an ordered distribution of these ions in the structure. The existence of nonequivalent Fe sites with statistical cation distribution in Y and Z positions was confirmed by experiments on iron oxidation in tourmaline, temperature studies of quadrupole splitting, and probability analysis of formation of nonequivalent sites in accordance with the tourmaline structure.
We established experimentally that iron ions in Y positions have a lower ionization potential than in Z positions. The coefficient of iron oxidation in tourmaline, the occupancy of crystallographic positions, and the nature of cation distribution in the structure are features permitting identification of the particular genetic type to which the test sample belongs.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bancroft, G.M., Maddock, A.G., Burns, R.G.: Application of the Mössbauer effect to silicate mineralogy. I. Iron silicates of known crystal structure. Geochim. Cosmochim. Acta 31, 2219–2246 (1967)
Belov, N.V.: Essays on structural mineralogy (in Russian). Collected Articles of the Lvov Geological Society 16, 14–44 (1962)
Belov, V.F., Khimich, T.A., Shippko, M.N., Voskresenskaya, I.E., Okulov, E.N.: Gamma resonance studies of ferriferous tourmalines (in Russian). Kristallografiya 18, 192–194 (1973a)
Belov, V.F., Kuzmin, V.I., Khimich, T.A., Dobrovolskaya, N.V., Shipko, M.N.: On the use of Mössbauer spectroscopy for studying ferriferous tourmalines. (in Russian). Dokl. Akad. Nauk SSSR 209, 922–925 (1973b)
Belov, V.F., Korovushkin, V.V., Belov, A.V., Korneev, E.V., Zheludev, I.S.: Nonequivalent sites of iron ions and electron-nuclear interactions in tourmaline. (in Russian). Phys. Tverd. Tela 16, 2410–2411 (1974)
Belov, A.F., Korneev, E.V., Khimich, T.A., Belov, V.F., Korovushkin, V.V., Zheludev, I.S., Kolesnikov, I.M.: Electron-nuclear interactions and nonequivalent sites of iron ions in tourmaline (in Russian). Zhurn. Phys. Chem. 49, 1683–1688 (1975)
Buerger, M.I., Burnham, C.W., Peacor, C.R.: Assessment of the several structures proposed for tourmaline. Acta Cryst. 15, 583–590 (1962)
Coster, M. de, Pollak, H., Amelinckx, S.: A study of Mössbauer absorption in iron silicates. Phys. Status Solidi 3, 283–288 (1963)
Godovikov, A.A.: Mineralogy (in Russian). Moscow: Nedra 1975
Gorelikova, N.V., Perfiliev, Yu. D., Babeshkin, A.M.: Distribution of iron ions in tourmaline structures according to Mössbauer spectroscopy data (in Russian). Zapisky Vsesoyuznogo Mineralogicheskogo Obshchestva 105, 418–427 (1976)
Ingalls, R.: Electric-field gradient tensor in ferrous compounds. Phys. Rev. 133, A787-A795 (1964)
Marfunin, A.S., Mkrtchyan, A.R., Nadzharyan, G.N., Nössik, Ya.M., Platonov, A.N.: Optical and Mössbauer opectra for iron in tourmalines (in Russian). Izv. Akad. Nauk SSSR [Geol.] 2, 146–150 (1970)
Zheludev, I.S., Belov, V.F.: Mössbauer effect in tourmaline and in solid BaTiO3 solution. (in Russian) Izv. Akad. Nauk SSSR [Phys.] 31, 1117–1119 (1967)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Korovushkin, V.V., Kuzmin, V.I. & Belov, V.F. Mössbauer studies of structural features in tourmaline of various genesis. Phys Chem Minerals 4, 209–220 (1979). https://doi.org/10.1007/BF00307945
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00307945