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MINERALS INDEX
Ilmenite |
| (Fe,Ti)2O3 |
| Hexagonal-trirhombohedral |
Forms
c(0001), r(1011), s(0221), n(2243), and doubtfully u(1014),
and V(2025).
| 1 | c, r, s, n, u, V |
| 2 | c, r, s |
Habit
Tabular crystals embedded in limestone.
Occurrence
Ilmenite is listed by Canfield (136) as found at Franklin, but no specimens were found or
seen confirming the report.
A specimen in the Canfield collection, from the stripping of the calamine deposit at Sterling Hill, shows jet-black crystals of ilmenite as much as an inch in diameter with black octahedrons of spinel, embedded in limestone. The crystals were measured and gave the forms of combination 2. Qualitative chemical tests showed the presence of titanium oxide and manganese, as well as of iron.
In a specimen said to have been found in the Winsor limestone quarry at Rudeville, near Franklin, grains and distinct crystals of ilmenite, with altered spinel and pyroxene, are embedded in limestone. The crystals show the forms of combination 1 and have the proportions of the crystal figured in Dana.1
1 System of mineralogy, 6th ed., figure 1, page 218, 1911.
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Website
© by Herb Yeates 1997-2001.
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This
page created: January 12, 2001 6:27 PM
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