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ferro-ilmenite
ferro-ilmenite n.
Brit. 
/ˌfɛrəʊˈɪlmᵻnʌɪt/
, /ˌfɛrəʊˈɪlmᵻnʌɪt/U.S. /ˌfɛroʊˈɪlməˌnaɪt/
[in sense (a) after German Ferroilmenit (R. Hermann 1870, in Jrnl. f. prakt. Chem. 2 119)] (a) a mineral containing iron and niobium, subsequently identified with columbite (now rare or disused); (b) an iron-rich variety of ilmenite./ˌfɛroʊˈɪlməˌnaɪt/ΚΠ
1870 Chem. News 30 Sept. 166/2 Composition of Ferro-Ilmenite, from Haddam, Connecticut, U.S.—R. Hermann.—The mineral alluded to is a tough, compact substance.
1909 Cent. Dict. Suppl. 861/2 Neptunium, a supposed new element announced by Hermann in 1877 as present in columbite and ferro-ilmenite.
1962 Jrnl. Sedimentary Petrol. 32 300/2 Ferroilmenite is defined as a ferromagnetic mineral having a rhombohedral structure.
1998 Jrnl. Geochem. Explor. 64 359 Iron-rich sediment: greensand, silty in places; magnetite and ferro-ilmenite beach sand; bog iron ore.
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