Gartrellite

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
More details...