Geodesic
Transformation of siderite in the zone of hypergenesis
Nanosistemy: fizika, himiâ, matematika, Tome 13 (2022) no. 5, pp. 539-545.

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The structure of siderite aggregates and its weathering products from the Ruza deposit, Moscow Region, has been studied by X-ray phase analysis and electron microscopy. The initial siderite is a dense FeCO$_3$ aggregate of micron-sized grains. The nodules are covered with an ocher weathered crust, the color intensity of which varies from light yellow to brown-black. A successive replacement of siderite by FeOOH goethite and lepidocrocite was revealed. It is accompanied by a sharp decrease in volume ($\sim$30%) and the formation of a microporous structure.
Keywords: carbonates, siderite, weathering, oxidation, nanomineralogy. 
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     author = {Pavel P. Fedorov and Ivan A. Novikov and Valery V. Voronov and Lubov V. Badyanova and Sergey V. Kuznetsov and Elena V. Chernova},
     title = {Transformation of siderite in the zone of hypergenesis},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
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     number = {5},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2022_13_5_a8/}
}
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Pavel P. Fedorov; Ivan A. Novikov; Valery V. Voronov; Lubov V. Badyanova; Sergey V. Kuznetsov; Elena V. Chernova. Transformation of siderite in the zone of hypergenesis. Nanosistemy: fizika, himiâ, matematika, Tome 13 (2022) no. 5, pp. 539-545. http://geodesic.mathdoc.fr/item/NANO_2022_13_5_a8/