General Information:
Chemical Formula:
KAl2(PO4)2(OH,F)·4(H2O)
Composition:
(Molecular Weight = 372.57 gm)
Potassium 10.49 % K
Aluminum 14.48 % Al
Phosphorus 16.63 % P
Hydrogen 2.37 % H
Oxygen 54.75 % O
Fluorine 1.27 % F
Empirical Formula:
KAl2(PO4)2(OH)0.75F0.25·4(H2O)
Name Origin:
Named after its locality Minyulo Well in western Australia.
Physical Properties:
Cleavage:
[001] Perfect
Color:
colorless, green, white, or light green.
Density:
2.46
Diaphaniety:
Transparent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Crystalline - Coarse - Occurs as well-formed coarse sized crystals.,
Hardness:
3.5 - Copper Penny
Luster:
Silky
Streak:
white
More details...