Titanite |
| CaTiSiO5 |
| Monoclinic |
Forms
c(001), b(010), m(110), n(111), l(112), t(111),
and w(221)
| Forms | Illustrations | |
| 1 | c, m, n. Commonest type. | |
| 2 | c, b, m, n, t, w | Figure 186 |
| 3 | c, b, m, n, l, t, w. Twin on (100) | Figure 187 |
Habit
Light-brown to dark-brown, rather simple crystals of characteristic titanite habit, an
inch in diameter, are found sparingly in the pegmatite at both Franklin and Sterling Hill.
The best specimens were found in the Trotter mine.
Titanite was also found occasionally in the pegmatite and ore of the iron mines. Handsome dark-brown crystals were collected in 1905 in the limestone of the Franklin Iron Company's quarry, associated with brown tourmaline, edenite, pyrrhotite, and graphite. The largest crystal was 19 inches across, and smaller crystals (see figures 186 and 187) were abundant.
| Figure 186 Crystal of titanite showing the forms c(001), b(010), m(110), n(111), t(111), and w(221). Franklin Iron Company's quarry. |
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Figure 187 Crystal of titanite twinned on the orthopinacoid, showing the forms c(001), b(010), m(110), n(111), l(112), t(111), and w(221). Franklin Iron Company's quarry. |
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Website
© by Herb Yeates 1997-2006.
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This
page created: August 12, 2006 7:18 PM
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