General Information:
Chemical Formula:
Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7
Composition:
(Molecular Weight = 524.46 gm)
Iron 5.32 % Fe
Copper 18.17 % Cu
Arsenic 21.43 % As
Hydrogen 0.08 % H
Lead 39.51 % Pb
Carbon 1.15 % C
Sulfur 3.06 % S
Oxygen 11.29 % O
Empirical Formula:
PbCu1.5Fe2+0.5(As)1.5(SO4)0.5(CO3)0.5(H2O)0.2
IMA Status:
Approved IMA
Locality:
Ashburton Downs, Western Australia.
Name Origin:
Named for Blair Gartrell (1950-1995), Australian collector who found the mineral.
Physical Properties:
Color:
greenish yellow or yellow.
Diaphaniety:
Transparent
Habits:
Encrustations - Forms crust-like aggregates on matrix., ,
Hardness:
1-2 - Between Talc and Gypsum
Luster:
Earthy (Dull)
Streak:
yellow
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