General Information:
Chemical Formula:(Li,Na)Al(PO4)(F,OH)
Composition:(Molecular Weight = 151.41 gm)Sodium 3.80 %
NaLithium 3.44 %
LiAluminum 17.82 %
AlPhosphorus 20.46 %
P Hydrogen 0.17 %
H Oxygen 44.91 %
O Fluorine 9.41 %
F Empirical Formula: Li0.75Na0.25Al(PO4)F0.75(OH)0.25
Name Origin:From the Greek amblys - "blunt" and goni - "angle."
Physical Properties: Cleavage:[100] Perfect, [110] Good, [011] Distinct
Color:white, yellow, gray, bluish gray, or greenish gray.
Density:2.98 - 3.11, Average = 3.04
Diaphaniety:Transparent to Subtransparent to translucent
Habits:Columnar - Forms columns, Euhedral Crystals - Occurs as well-formed crystals showing good external form., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:5.5-6 - Knife Blade-Orthoclase
Luminescence:None.
Luster:Vitreous - Pearly
Streak:white
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