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    Humboldtine
    Hbd
    Fe2+(C2O4)·2H2O
    Fe2+(C2)6+O4·2H2O
    Fe2+ C O H
    de Rivero M (1821) Note sur une combinaison de l'acide oxalique avec le fer trouvé à Kolowserux, près Belin en Bohéme. Annales de Chimie et de Physique 18, 207-210  [view file]
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    humboldtine.pdf
    de Rivero M (1821) Note sur une combinaison de l'acide oxalique avec le fer trouvé à Kolowserux, près Belin en Bohéme. Annales de Chimie et de Physique 18, 207-210  [view file]
    Echigo T, Kimata M (2010) Crystal chemistry and genesis of organic minerals: A review of oxalate and polycyclic aromatic hydrocarbon minerals. The Canadian Mineralogist 48, 1329-1358  [view file]
    Echigo T, Kimata M (2008) Single-crystal X-ray diffraction and spectroscopic studies on humboldtine and lindbergite: weak Jahn-Teller effect of Fe2+ ion. Physics and Chemistry of Minerals 35, 467-475
    Frost R L, Weier M L (2003) Raman spectroscopy of natural oxalates at 298 and 77 K. Journal of Raman Spectroscopy 34, 776-785  [ URL]
    Mazzi F, Garavelli C (1957) La struttura della oxalite, FeC2O4·2H2O. Periodico di Mineralogia 26, 269-303
    Piro O E, Baran E J (2018) Crystal chemistry of organic minerals-salts of organic acids: The synthetic approach. Crystallography Reviews 24, 149-175