Russian Mineralogical Society
XII General Meeting of the Russian Mineralogical Society
Crystal-chemical peculiarities of globular layer silicates of the glauconite-illite series of the Upper proterozoic, Cambrian and Lower Ordovician deposits

RMS-DPI code:  2015-1-107-0
Scientific session:  5. Mineralogical crystallography, crystal chemistry and new minerals (Fyodorov Session)
Author listing:  Ivanovskaya T.A., Zviagina B.B., Zaitseva T.S.
Principal author:  Ivanovskaya Tatyana Andreevna
Language:  Russian
Abstract - Summary 
(short description):
The work is a generalization of the data on the structural and crystal-chemical features of globular dioctahedral 2:1 phyllosilicates of glauconite-illite composition (89 samples) from the Precambrian, Cambrian and the Lower Ordovician deposits (Northern and Eastern Siberia, Southern Urals, Srednii Peninsula, Podolia, Northern Verkhoynۥe, Eastern and Western Baltic). The studied samples show wide variations of the contents of di- and trivalent cations in the octahedral sheets of 2:1 layers. The data obtained demonstrate that the compositional variations in the studied glauconite-illite varieties are beyond the limits established by IMA NC AIPEA NC (Rieder et al., 1998, Guggenheim et al., 2006). A revision is therefore required for the existing classification of low-charge dioctahedral micaceous minerals of the glauconite-illite series.
RMS-DPI code:  2015-1-107-0
File of proceedings 
 263 K
Status:  printed
Accepted:  03/09/2015
Contact author(s):  Ivanovskaya, Tatyana Andreevna

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