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Dominant species
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Triphylite
Chemical
Formula
LiMnPO4
Species
Phosphates
Crystal
System
Orthorhombic
Mohs
Scale
4
Specific
Gravity
3.445-3.50
Color
Clove-brown, yellowish brown, honey-yellow, salmon-pink, blue-gray, gray
Streak
White to grayish white
Luster
Sub-Vitreous, Resinous, Greasy
Refractive
Index
n = 1.689 - 1.705 n = 1.685 - 1.710 n = 1.685 - 1.720
Diaphaneity
Translucent
Cleavage
Very GoodOn nearly perfect; on good; on poor.
Fracture
Irregular/Uneven
Crystal Habit:Prismatic – crystals shaped like slender prisms
Geological Setting:Complex zoned granitic pegmatites.
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Triphylite3365
Triphylite3361
Triphylite3361