Min. [ad. Ger. triplit (Hausmann, 1813), f. Gr. τριπλοῦς threefold, in reference to its three cleavages: see -ITE1.] A phosphate of iron and manganese (often containing fluorine), of a brown or blackish color, with cleavage in three directions mutually at right angles.
1850. Ansted, Elem. Geol., Min., etc., § 447. Hureaulite, Heterozite, and Triphylline, or Triplite, are phosphates of manganese and iron.
1868. Dana, Min. (ed. 5), 543.
