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Cardile, C.M. Tetrahedral Fe3+ in Ferrihydrite: 57Fe Möossbauer Spectroscopic Evidence. Clays Clay Miner. 36, 537–539 (1988). https://doi.org/10.1346/CCMN.1988.0360607
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DOI: https://doi.org/10.1346/CCMN.1988.0360607