humboldtine

humboldtine

[′həm‚bōl‚tēn]
(mineralogy)
FeC2O4·2H2O A mineral composed of hydrous ferrous oxalate. Also known as humboldtite; oxalite.
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References in periodicals archive ?
Humboldtine [Fe.sup.2+][C.sub.2][O.sub.4]*2[H.sub.2]O
Humboldtine is exceedingly rare at the Francon quarry, where it has been found as bright yellow inclusions in quartz (Sabina, 1992, 1994).
Interesting accessory minerals include phenakite and euclase, as 2-3 mm crystals, and a fairly large amount or orange-brown humboldtine. The humboldtine is entirely natural and not the result of any chemical treatment of the specimens.