ferroan, a. Min.
(ˈfɛrəʊən, fəˈrəʊən)
[f. L. ferr-um iron + -oan.]
Of a mineral: having a (small) proportion of a constituent element replaced by ferrous iron.
| 1930 W. T. Schaller in Amer. Mineralogist XV. 571 Iron—ferroan, ferrian. 1944 C. Palache et al. Dana's Syst. Min. (ed. 7) I. 637 Some fibrous brucite is reported to be highly ferroan, but this may be owing to admixed magnetite. 1965 G. J. Williams Econ. Geol. N.Z. xi. 167/2 The occurrence of camptonites, vogesites and monchiquite with abundant ferroan dolomite. |