General Information:
Chemical Formula:Mg5Al12(PO4)8(OH)22·32(H2O)
Composition:(Molecular Weight = 2,155.72 gm)Magnesium 5.64 %
MgAluminum 15.02 %
AlPhosphorus 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
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