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Aldermanite

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Aldermanite
Aldermanite is a rare hydrated phosphate mineral with formula Mg5Al12(PO4)8(OH)22·32H2O. It's named after Arthur Richard Alderman (1901–1980), Professor of Geology and Mineralogy, University of Adelaide. Its type locality is Moculta Phosphate Quarry (Klemm's Quarry), Angaston, Barossa Valley, North Mount Lofty Ranges, Mount Lofty RangesSouth AustraliaAustralia.

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Mineralogy Database Dictionary

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Aldermanite

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 % 
Hydrogen 4.02 % 
Oxygen 63.83 % 
 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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