humboldtine Min.
(ˈhʊmbəʊltaɪn)
[f. (1821) as prec.: see -ine.]
Hydrous oxalate of iron, found usually in capillary crystals.
| 1822 Amer. Jrnl. Sc. V. 193 A new mineral, discovered..near Bilin in Bohemia has been named Humboldtine. 1852 Shepard Min. 76 Humboldtine..blackens in the flame of a candle. |