A brownish-black mineral of the epidote group, consisting of a silicate of rare earth metals, aluminium, and iron.
- Large titanite euhedra are abundant along with apatite and zircon, with allanite and epidote less so.
- In his 1885 report, Eakins described allanite and gadolinite from the area.
- Gadolinite and allanite intergrowths form walnut-shaped vitreous black masses and nodules to 5 cm across.
Early 19th century: named after Thomas Allan (1777–1833), Scottish mineralogist, + -ite1.
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