Abstract
The influence of structural defects on the polymorphic transformations in quartz was studied by electron paramagnetic resonance and electron microscopy. It was established that the kinetics of the accumulation of the clusters of the β-phase depends on isomorphic impurities in quartz. It was confirmed that germanium ions and vacancies in quartz participate in the formation of the clusters. Obtained results allow the assumption that the amount of germanium required to preserve clusters increases with increasing temperature and vice versa. An explanation is presented for experimentally observed decomposition of clusters during artificial heating of some quartz samples. It was found that the clusters of the β-phase are autonomous units, i.e. may exist independently of host crystalline structure of quartz. The possible mechanism of influence of Ge impurity on the temperature of α-β-transition in quarts is discussed.
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References
L. T. Rakov, “Study of Trace Elements in Quartz,” in Proceedings of International Mineralogical Seminar on the Structure and Diversity of Mineral World (Syktyvkar, 2008), pp. 265–266 [in Russian].
L. T. Rakov and G. I. Krylova, “Role of Structural Impurities in Polymorphic Transformations in Quartz,” Geochem. Int. 39, 1172–1178 (2001).
L. T. Rakov, M. A. Pleskova, and B. M. Moiseev, “Paramagnetic Center in Thermally Treated Quartz,” Dokl. Akad. Nauk SSSR 289(4), 962–965 (1986).
L. T. Rakov, “Behavior of Paramagnetic Defects during Thermal Annealing of Quartz,” Kristallografiya 34(1), 260–262 (1989).
L. T. Rakov, N. D. Milovidova, and B. M. Moiseev, Express EPR Determination of Contents of Isomorphic Impurities in Samples of Quartz Raw Materials (VIMS, Moscow, 1991) [in Russian].
L. T. Rakov, “Mechanisms of Isomorphic Substitution in Quartz,” Geochem. Int. 44, 1004–1014 (2006).
G. N. Baturin and V. T. Dubinchuk, Microtextures of Oceanic Phosphrites. Atlas of Microimages (Nauka, Moscow, 1979) [in Russian].
P. Hirsh, A. Hovy, R. Nicholson, D. Pashley, and M. Whelan, Electron Microscopy of Thin Crystals; Mir, Moscow, 1968 [in Russian].
V. V. Strokova and A. V. Shamshurov, “Kinetics of Quartz Polymorphism based on Data of High-Temperature Radiography,” in “Kvartskremnezem”. Proceedings of International Seminar (Syktyvkar, 2004), pp. 44–45 [in Russian].
L. T. Rakov, “Theory of Sparring Defects as Tool for Studying the Defect Formation in Quartz,” in Proceedings of International Seminar on Mineralogical Intervention in Micro and Nanoworld (Syktyvkar, 2009), pp. 409–411 [in Russian].
Bokshtein, B.S., Diffusion in Metals (Metallurgiya, Moscow, 1978).
K. Kihara, “An X-Ray Study of the Temperature Dependence of the Quartz Structure,” Eur. J. Mineral 2, 63–67 (1990).
N. M. Emmanuel’ and D. G. Knorre, Course of Chemical Kinetics (Vysshaya shkola, Moscow, 1974) [in Russian].
D. V. Balitsky, V. S. Balitsky, and G. V. Bondarenko, “Experimental Study of the Influence of Crystallization Conditions on Capture and Distribution of Germanium Impurities in Synthetic Quartz,” in Proceedings of Annual Seminar on Experimental Mineralogy, Petrography, and Geochemistry, Moscow, Russia, 2009 (Moscow, 2009), pp. 9–10 [in Russian].
L. T. Rakov, “General Aspects of the Formation of Structural Defects in Quartz,” Geochem. Int. 43, 1098–1107 (2005).
V. S. Urusov, V. L. Tauson, and V. V. Akimov, Solid State Geochemistry (GEOS, Moscow, 1997) [in Russian].
Physical Encyclopedia (Bol’shaya Ross. Entsikloped., Moscow, 1992), Vol. 3 [in Russian].
A. G. Khachaturyan, Theory of Phase Transformations and Structure of Solid Solutions (Moscow, 1974) [in Russian].
L. T. Rakov, “Accumulation of Low-Dose Paramagnetic Centers in Quartz,” Geochem. Int. 36, 367–369 (1998).
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Original Russian Text © L.T. Rakov, V.T. Dubinchuk, 2012, published in Geokhimiya, 2012, Vol. 50, No. 8, pp. 749–763.
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Rakov, L.T., Dubinchuk, V.T. Structural defects and polymorphic transformations in quartz. Geochem. Int. 50, 671–682 (2012). https://doi.org/10.1134/S0016702912060067
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DOI: https://doi.org/10.1134/S0016702912060067