Filiform crystals in meteorites

1Semenenko, VP, 1Gorovenko, TM
1M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2017, 9:76-83
Section: Geosciences
Language: Ukrainian

The original and literature data on the findings of filiform crystals (FFC) in meteorites are given. It is shown that they have pre-terrestrial and terrestrial origins. Rhabdite crystals in iron meteorites and pallasites, taenite ones in ataxites, and graphite ones in carbonaceous xenoliths of chondrites are the most common among the pre-terrestrial FFC. It is assumed that their formation is a result of solid phase transformations during the slow cooling of meteorite parent bodies. Unlike them, the olivine and Ca-pyroxene FFC within a fine-grained matter of chondrites and Fe,Ni-metal FFC in pallasites are rare. The morphological characteristics of the meteoritic FFC are similar to those of the artificially grown ones, although they differ by a narrower variety of crystallographic forms and the priority of formation conditions.

Keywords: filiform crystals, metamorphic transformation, meteorites, minerals, origin
  1. Maleev, M. N. (1971). Properties and origin of the natural filiform crystals and aggregates. Moscow: Nauka (in Russian).
  2. Syrkin, V. G. (1989). Materials of the future. About the metal filiform crystals. Moscow: Gosizdat (in Russian).
  3. Semenenko, V. P. & Girich, A. L. (1995). Mineralogy of a unique graphite-containing fragment in the Krymka chondrite (LL3). Mineral. Mag., 59, No. 396, pp. 443-454.
  4. Artem'ev, S. R. & Belan, S. V. (2013). Properties and main methods of the filiform crystals producing. Vost.- Evrop. zhurn. peredovyh tehnologij, 5, No. 1, pp. 22-25 (in Russian).
  5. Berezhkova, G. V. (1969). Filiform crystals. Moscow: Nauka (in Russian).
  6. Givargizov, E. I. (1977). Growth of filiform and lamellar crystals from vapor. Moscow: Nauka (in Russian).
  7. Semenenko, V. P., Bishoff, A., Weber, I. & Girich, A. L. (2001). Mineralogy of fine-grained material in the Krymka (LL3.1) chondrite. Meteorit. Planet. Sci. 36, pp. 1067-1085.
  8. Weisberg, M. K., Zolensky, M. E. & Prinz, M. (1997). Fayalitic olivine in matrix of the Krymka LL3.1 chondrite: Vapor-solid growth in the solar nebula. Meteorit. Planet. Sci., 32, No. 6, pp. 791-801.
  9. Semenenko, V. P., Girich, A. L. & Nittler, L. R. (2004). An exotic kind of cosmic material: Graphite-containing xenoliths from the Krymka (LL3.1) chondrite. Geochim. Cosmochim. Acta, 68, No. 3, pp. 455-475.
  10. Shyrinbekova, S. N. & Semenenko, V. P. (2006). Features of the Chinga ataxite selective weathering. Zap. Ukr. mineral. tov-va, 3, pp. 196-199 (in Ukrainian).
  11. Clarke, R. S., Jr. & Goldstein, J. I. (1978). Schreibersite growth and its influence on the metallography of coarse-structured iron meteorites. Smithsonian contributions to the earth sciences, No. 21. Washington: Smithsonian Institution Press.
  12. Grigor'ev, D. P., Krecer, Y. L. (1983). About ontogeny of schreibersite and rhabdite in the Sikhote-Alin meteorite. Dokl. AN SSSR, 270, No. 5, pp. 1192-1195 (in Russian).
  13. Semenenko, V. P., Kozlov, I. S. & Tertychnaja, B. V. (1986). Evidences of shock metamorphism in the Mar'inka iron meteorite. Meteoritika, 45, pp. 102-105 (in Russian).
  14. Semenenko, V.P., Girich, A.L. & Kychan, N.V. (2012). Fine-grained xenolith AL1 in the Allende (CV3) chondrite: mineralogy and origin. Dopov. Nac. akad. nauk Ukr., No. 8, pp. 86-93 (in Ukrainian).
  15. Gorovenko, T. M. & Semenenko, V. P. (2011). Nickel-iron morphological features in the Omolon pallasite. Zap. Ukr. mineral. tov-va, 8, pp. 45-48 (in Ukrainian).