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X-ray study of the nature of stacking faults in the structure of glauconites

Published online by Cambridge University Press:  09 July 2018

B. A. Sakharov ,
G. Besson ,
V. A. Drits ,
M. Yu. Kameneva ,
A. L. Salyn  and
B. B. Smoliar
B. A. Sakharov
Affiliation:
Institute of Geology and Mineralogy, Acad. Sci. USSR, Moscow, USSR
G. Besson
Affiliation:
Laboratoire de Cristallographie, Université d’Orléans, B.P. 6759, 45067 Orléans Cedex 2, France
V. A. Drits
Affiliation:
Institute of Geology and Mineralogy, Acad. Sci. USSR, Moscow, USSR
M. Yu. Kameneva
Affiliation:
Institute of Geophysics and Geology, Acad. Sci. USSR, Novosibirsk, USSR
A. L. Salyn
Affiliation:
Institute of Geology and Mineralogy, Acad. Sci. USSR, Moscow, USSR
B. B. Smoliar
Affiliation:
Institute of Geology and Mineralogy, Acad. Sci. USSR, Moscow, USSR
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Abstract

Glauconites are dioctahedral, microdivided, Fe-containing silicates whose idealized structure may be described as a stacking of 2 : 1 layers with the same azimuthal orientation. The diffractometric and crystallochemical data do not coincide with this idealized structural model. For each glauconite studied the best fit between experimental and theoretical XRD patterns was obtained using the same model. It was possible to describe the stacking by an equally probable occurrence of layers rotated by multiples of 60°. The layer types alternate with a definite tendency to segregation. The model is characteristic for all glauconites, irrespective of composition, age and type of host rock. The alternation of layers rotated by 60° in the structure leads to both octahedral and prismatic coordination for the interlayer K+ cation.

Type
Research Article
Information
Clay Minerals , Volume 25 , Issue 4 , December 1990 , pp. 419 - 435
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1990

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References

Amouric, M. & Parron, C. (1985) Structure and growth mechanism of glauconite as seen by high-resolution transmission electron microscopy. Clays Clay Miner., 33, 473–482.Google Scholar
Bentoz, Y.K. & Kastner, M. (1965) Notes on the mineralogy and origin of glauconite. J. Sed. Pet., 35, 155–166.Google Scholar
Bookin, A.S. & Smoliar, B.B. (1985) Simulation of bond lengths in coordination polyhedra of 2:1 layer silicates. Proc. 5th Meet. European Clay Groups, Prague,, 51–56.Google Scholar
Buckley, H.A., Bevan, J.A., Brown, K.M., Johnson, L.R. & Farmer, V.C. (1978) Glauconite and celadonite: two separate mineral species. Mineral. Mag., 42, 373–392.Google Scholar
Burst, J.F. (1958) Mineralogical heterogeneity in glauconite pellets. Am. Miner., 43, 481–497.Google Scholar
Drits, V.A.& Sakharov, B.A. (1976) X-ray Structure Analysis of Mixed-Layer Minerals. Nauka, Moscow, 256pp. (in Russian).Google Scholar
Hower, J. (1961) Some factors concerning the nature and origin of glauconite. Am. Miner., 46, 313–334.Google Scholar
Ivanovskaya, T.A. & Tsipursky, S.I. (1989) First findings of Fe-glauconite in upper Proterozoic sediments. Litologiya i Poleznye Iskopayem (in press) (in Russian).Google Scholar
Kossovskaya, A.G. & Drits, V.A. (1971) Problems in crystal-chemical and genetical classification of micaceous minerals from sedimentary rocks. Pp. 71–95 in: Epigenesis and its Mineral Indicators. Nauka, Moscow (in Russian).Google Scholar
Nikolayeva, I.V. (1971) Minerals of the glauconite group and evolution of their chemical composition. Pp. 320–336 in: Problems of General and Regional Geology. Nauka, Novosibirsk (in Russian).Google Scholar
Nikolayeva, I.V. (1977) Minerals of the Glauconite Group in Sedimentary Formations.Nauka, Novosibirsk, 320pp. (in Russian).Google Scholar
Odin, G.S. (1975) Les glauconites constitution, formation, age.PhD thesis, Univ. Paris, France.Google Scholar
Odom, I.E. (1984) Glauconite and celadonite minerals. Pp. 545-572 in: Micas. Reviews in Mineralogy, 13, Mineral. Soc. America.Google Scholar
Plancon, A. (1980) The calculation of intensities diffracted by a partially oriented powder with a layer structure. J. Appl. Cryst., 13, 8–13.Google Scholar
Plancon, A. & Tchoubar, C. (1977) Determination of structural defects in phyllosilicates by X-ray powder diffraction. I. Principle of calculation of the diffraction phenomenon. Clays Clay Miner., 25, 430–435.Google Scholar
Sakharov, B.A., Naumov, A.S. & Drits, V.A. (1982a) X-ray diffraction by mixed-layer structures with random distribution of stacking faults. Doklady AN SSSR, 265, 339–343 (in Russian).Google Scholar
Sakharov, B.A., Naumov, A.S. & Drits, V.A. (1982b) X-ray intensities scattered by defective layer structures with short range ordering factors s ≥ 1, G ≤ 1. Doklady AN SSSR,, 265, 871–874 (in Russian).Google Scholar
Sakharov, B.A., Naumov, A.S. & Drits, V.A. (1983) Scattering of X-rays by defective layer structures. Kristallografia, 28, 951–958 (in Russian).Google Scholar
Shutov, V.D., Katz, M.Ya., Drits, V.A., Sokolova, A.L. & Kazakov, G.A. (1972) Crystallochemical heterogeneity of glauconite as depending on the conditions of its formation and postsedimentary changes. Proc. Int. Clay Conf. Madrid, 269–277.Google Scholar
Smoliar, B.B. & Drits, V.A. (1989) Crystal structure simulation of micas having random distribution of isomorphous cations. Mineralogitchesky zhurn (in press) (in Russian).Google Scholar
Tsipursky, S.I. & Ivanovskaya, T.A. (1988) Crystal chemistry of globular layer silicates. Litologiya i poleznye no. 1, 4149 (in Russian).Google Scholar
Zhoukhlistov, A.P., Zvyagin, B.B., Soboleva, S.V. & Fedotov, A.F. (1973) The crystal structure of the dioctahedral mica 2M 2 determined by high voltage electron diffraction. Clays Clay Miner., 21, 465–470.Google Scholar