General Information:
Chemical Formula:
Mg5Al12(PO4)8(OH)22·32(H2O)
Composition:
(Molecular Weight = 2,155.72 gm)
Magnesium 5.64 % Mg
Aluminum 15.02 % Al
Phosphorus 11.49 % P
Hydrogen 4.02 % H
Oxygen 63.83 % O
Empirical Formula:
Mg5Al12(PO4)8(OH)22·32(H2O)
Environment:
Moculata P deposit with fluellite.
IMA Status:
Approved IMA 1980
Locality:
TL: Angaston, 60 km NE of Adelaide, Australia, SA,
Name Origin:
Named for Arthur Richard Alderman (1901-1980), Mineralogist and petrologist, University of Adelaide, SA, Australia.
Physical Properties:
Color:
colorless.
Diaphaniety:
Transparent
Habits:
Fibrous - Crystals made up of fibers., Flakes - Flat, thin crystals or aggregates.,
Hardness:
2 - Gypsum
Luster:
Pearly
Streak:
white
More details...