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Triplite
Chemical Formula	(Mn,Fe)2(PO4)(F,OH)
Species	Phosphates
Crystal System	Monoclinic
Mohs Scale	5
Specific Gravity	3.5-3.9
Color	Chestnut to reddish brown, flesh-red, salmon-pink
Streak	White to brown
Luster	Vitreous, Resinous
Refractive Index	n = 1.650 n = 1.660 n = 1.680
Diaphaneity	Opaque
Cleavage	Distinct/GoodOn , good; on , fair; and on , poor.
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Prismatic, massive to nodular
Geological Setting：Granitic pegmatites of the complex, phosphate-rich type. Also occurs in high temperature vein (Nevada).

Triplite is a rare phosphate mineral with formula: (Mn,Fe)₂PO₄(F,OH). It occurs in phosphate-rich granitic pegmatites typically as irregular brown opaque masses. Triplite was first described in 1813 for an occurrence in Chanteloube, Limousin, France. The name is from the Greek triplos for triple, in reference to the three cleavage directions. In color and appearance, it is very similar to rhodocrosite, another manganese bearing mineral. Chemically, it is also quite similar to triploidite the difference being that triplite is fluorine dominant while triploidite is hydroxide dominant.

Occurrence

Triplite is a rare fluoro-hydroxide phosphate mineral that forms in phosphate rich granite pegmatites and high temperature hydrothermal veins. It has been found in the United States in California, Nevada, Arizona, Colorado, South Dakota, Virginia, Connecticut, and Maine. Other occurrences include the Shigar Valley, Pakistan; China; Bavaria, Germany; Kimito, Finland and Karibib, Namibia.