a rare mineral of serie lithiophilite with formula: 4[LiMn(PO₄)] and triphylite with formula: 4[LiFe(PO₄)].

System: orthorhombic.

Formula: 4[Li(Fe,Mn)PO₄].

Luster: resinous, vitreous, greasy.

Colors: greenish gray, blue-gray, gray, yellow, honey yellow, bluish gray, externally brownish black.

Streak: colorless to gray.

Diaphaneity: translucent to transparent.

Cleavage: {001} perfect, {100} distinct, and {010} imperfect.

Fracture: subconchoidal to uneven.

SG: 3.43–3.56.

H: 4–5.

Optics; α:1.688–1.693, β:1.693, γ:1.695–1.702.

Birefringence: 0.006–0.008. ⊕ or sometimes ⊖.

Found in Brazil, Sweden, Finland, France, and USA.