Инд. авторы:	Palchik N.A., Moroz T.N., Grigorieva T.N.
Заглавие:	Features of the composition and structural transformations of manganese minerals of the lake Bol'shoe Miassovo (South Ural)
Библ. ссылка:	Palchik N.A., Moroz T.N., Grigorieva T.N. Features of the composition and structural transformations of manganese minerals of the lake Bol'shoe Miassovo (South Ural) // Journal of Structural Chemistry. - 2014. - Vol.55. - Iss. 4. - P.764-770. - ISSN 0022-4766. - EISSN 1573-8779.
Внешние системы:	DOI: 10.1134/S0022476614040271; РИНЦ: 24020001; SCOPUS: 2-s2.0-84919395434; WoS: 000342415000027;
Реферат:	eng: The mineral and microelement composition of natural manganese minerals from iron-manganese concretions of the Bol'shoe Miassovo lake (South Ural) is investigated. The structural transformations of the samples under the effect of different temperatures are studied. Apart from layered 9.6 A˚ and 7.2 A˚ structures of manganese minerals the lake samples often contain various manganese-containing carbonates. For carbonate minerals by IR spectroscopy the dependence of the wavenumbers of ν2 and ν4 vibrations of the CO3 group on the mineral composition is analyzed. The composition of macro- and microelements of iron-manganese concretions of Bol'shoe Miassovo lake varies in wide ranges not only in different samples, but also in different parts of the same sample. An analysis of the microstructure of lake manganese concretions revealed their biomorphic nature that is exhibited in globe-shaped to filament organic bacterial forms. © 2014 N. A. Palchik, T. N. Moroz, T. N. Grigorieva. © 2014 by Pleiades Publishing, Ltd.
Ключевые слова:	IR spectroscopy; Manganese minerals; X-ray diffraction; Temperature effect; Structure; Properties; Chemical composition;
Издано:	2014
Физ. характеристика:	с.764-770