General Information:
Chemical Formula:
Al2(PO4)(SO4)(OH)·9(H2O)
Composition:
(Molecular Weight = 424.14 gm)
Aluminum 12.72 % Al
Phosphorus 7.30 % P
Hydrogen 4.52 % H
Sulfur 7.56 % S
Oxygen 67.90 % O
Empirical Formula:
Al2(PO4)(SO4)(OH)·9(H2O)
IMA Status:
Approved IMA 1968
Locality:
Sierra Chica de Zonda, San Juan Province, Argentina.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
None
Color:
white.
Density:
1.94
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
3 - Calcite
Luster:
Silky
Streak:
white
More details...