Montebrasite
Chemical Formula	LiAl(PO4)(OH)
Species	Phosphates
Crystal System	Triclinic
Mohs Scale	5-6
Specific Gravity	2.98
Color	White, colorless, gray white, very pale brown, pale pink, pale yellow
Streak	White
Luster	Sub-Vitreous, Resinous, Greasy, Pearly
Refractive Index	n = 1.594 - 1.615 n = 1.608 - 1.624 n = 1.616 - 1.645
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect on , good on , distinct on , and on , imperfect.
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Crude crystals, typically equant to short prismatic , with complex form development, to 1.5 meters; also occurs as large cleavable masses; columnar; compact.
Geological Setting：A late primary mineral in zoned, complex granitic pegmatites.