Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-24T17:54:54.319Z Has data issue: false hasContentIssue false
  • English
  • Français

On the complex zonality in grandite garnets and implications

Published online by Cambridge University Press:  05 July 2018

T. I. Ivanova ,
A. G. Shtukenberg ,
Yu. O. Punin ,
O. V. Frank-Kamenetskaya  and
P. B. Sokolov
T. I. Ivanova
Affiliation:
Department of Crystallography, Saint-Petersburg State University, University Emb. 7/9, 199034 Saint-Petersburg, Russia
A. G. Shtukenberg
Affiliation:
Department of Crystallography, Saint-Petersburg State University, University Emb. 7/9, 199034 Saint-Petersburg, Russia
Yu. O. Punin
Affiliation:
Department of Crystallography, Saint-Petersburg State University, University Emb. 7/9, 199034 Saint-Petersburg, Russia
O. V. Frank-Kamenetskaya
Affiliation:
Department of Crystallography, Saint-Petersburg State University, University Emb. 7/9, 199034 Saint-Petersburg, Russia
P. B. Sokolov
Affiliation:
Department of Crystallography, Saint-Petersburg State University, University Emb. 7/9, 199034 Saint-Petersburg, Russia
Get access Rights & Permissions [Opens in a new window]

Abstract

The available data on compositional zoning in grossular-andradite (grandite) garnets occurring at different scales, mainly due to the variations of their Fe3+/Al ratios, and the hypotheses on the origin of this zoning are reviewed. Four zoned crystals of grandites showing different optical properties have been studied by means of X-ray diffraction. Optical and structural studies suggest three superimposed scales of Fe3+/Al zonality along [110]. The drastic change of the structural characteristics from sample to sample correlates with the change of their optical patterns. The superfine oscillatory zoning has been described in terms of irregular interstratified structures with a high degree of segregation. The self-affinity of zoning at different scales testify to the possible origin of the zonality due to the non-linear dynamics at the growth front. The wide variation of the layer compositions revealed by the modelling of the X-ray diffraction profiles seems to contradict the hypothesis of unmixing in grandite garnets.

Keywords

garnetgranditezoning
Type
Research Article
Information
Mineralogical Magazine , Volume 62 , Issue 6 , December 1998 , pp. 857 - 868
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Akizuki, M., Nakai, H. and Suzuki, T. (1984) Origin of iridescence in grandite garnets. Amer. Mineral., 69, 896–901.Google Scholar
Allegre, C.J., Provost, A. and Jaupart, C. (1981) Oscillatory zoning: a pathological case of crystal growth. Nature, 294, 223–8.CrossRefGoogle Scholar
Allen, F.M. and Buseck, P.R. (1988) XRD, FTIR and TEM studies of optically anisotropic grossular garnets. Amer. Mineral., 73, 568–84.Google Scholar
Drits, V.A. and Tchoubar, C. (1990) X-ray Diffraction by Disordered Lamellar Structures. Berlin: Springer, 371 pp.CrossRefGoogle Scholar
Engi, M. and Wersin, P. (1987) Derivation and application of a solution model for calcic garnet. Schweiz. Mineral. Petrog. Mitt., 67, 53–73.Google Scholar
Frank-Kamenetskaya, O.V. and Ivanova, T.I. (1997) The modelling of irregular interstratified structures of single crystals with chemical inhomogeneity. Cryst. Res. Technol., 32, 195–211.CrossRefGoogle Scholar
Ganguly, J. (1976) The energetics of natural garnet solid solution. II. Mixing of the calcium silicate endmembers. Contrib. Mineral. Petrol., 55, 81–90.CrossRefGoogle Scholar
Guinier, A. (1961) X-ray Analysis of Crystals. Moscow: Fizmatgiz, 604 pp. (in Russian).Google Scholar
Haase, C.S., Chadam, J., Feinn, D. and Ortoleva, P. (1980) Oscillatory zoning in plagioclase feldspar. Science, 209, 272–4.CrossRefGoogle ScholarPubMed
Heurex, J.L. and Fowler, A.D. (1994) A non-linear model of oscillatory zoning in plagioclase. Amer. Mineral., 79, 885–91.Google Scholar
Hirai, H. and Nakazawa, H (1982) Origin of iridescence in garnet: An optical interference study. Phys. Chem. Mineral., 8, 25–8.CrossRefGoogle Scholar
Hirai, H., Sueno, S. and Nakazawa, H (1982) A lamellar texture with chemical contrast in grandite garnet from Nevada. Amer. Mineral., 67, 1242–7.Google Scholar
Hirai, H. and Nakazawa, H (1986 a) Grandite garnet from Nevada: Confirmation of origin of iridescence by electron microscopy and interpretation of a moire-like texture. Amer. Mineral., 71, 123-6.Google Scholar
Hirai, H. and Nakazawa, H (1986 b) Visualising low symmetry of a grandite garnet on precession photographs. Amer. Mineral., 71, 1210-3.Google Scholar
Ivanova, T.I., Frank-Kamenetskaya, O.V., Moshkin, S.V. and Vlasov, M.Yu. (1994) The types of structural inhomogeneity of perovskite-like superconductors. Zhurn. Strukt. Khimii, 35, 15–22.(in Russian).Google Scholar
Jamtveit, B. (1991) Oscillatory zonation in hydrothermal grossular–andradite garnet: Non-linear dynamics in region of immiscibility. Amer. Mineral., 76, 1319-27.Google Scholar
Jamtveit, B., Wogelius, R.A. and Fraser, D.G. (1993) Zonation patterns of skarn garnets: Records of hydrothermal system evolution. Geology, 21, 113–6.2.3.CO;2>CrossRefGoogle Scholar
Jamtveit, B., Ragnarsdottir, K.V. and Wood, B.J. (1995) On the origin of zoned grossular-andradite garnets in hydrothermal systems. Eur. J. Mineral., 7, 1339–410.CrossRefGoogle Scholar
Kingma, T. and Downs, G. (1989) Crystal-structure analysis of a birefringent andradite. Amer. Mineral., 74, 1307–16.Google Scholar
Lager, G.A., Armbruster, I. and Rotella, F.G. (1989) OH substitution in garnets: X-ray and neutron diffraction, infrared, and geometric-modeling studies. Amer. Mineral., 74, 840–51.Google Scholar
Lessing, P. and Standish, R.P. (1973) Zoned garnet from Crested Butte, Colorado. Amer. Mineral., 58, 840–2.Google Scholar
Murad, E. (1976) Zoned, birefringent garnets from Thera Island, Santorini Group (Aegean Sea). Mineral. Mag., 40, 715-9.CrossRefGoogle Scholar
Novak, G.A. and Gibbs, G.V. (1971) The crystal chemistry of the silicate garnets. Amer. Mineral., 56, 791–823.Google Scholar
Sato, M. (1965) Structure of interstratified (mixed-layer) minerals. Nature, 208, 70–1.CrossRefGoogle Scholar
Shtukenberg, A.G. and Punin, Yu.O. (1996) Optical anomalies in crystals. Zap. Vses. Mineral. Obshch., 125, 104–20.(in Russian).Google Scholar
Takeuchi, Y., Haga, N., Umizu, S. and Sato, G. (1982) The derivate structure of silicate garnets in Grandite. Z. Kristallogr., 158, 53–99.CrossRefGoogle Scholar
Vlasova, D.K., Zharikov, V.A., Laputina, I.P. and Podlessky, K.V. (1975) Zoned garnets from skarns of Chorukh-Doiron. Zap. Vses. Mineral. Obshch., 104, 220–8(in Russian).Google Scholar