General Information:
Chemical Formula:(Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O)
Composition:(Molecular Weight = 511.39 gm)Barium 2.69 %
BaStrontium 10.28 %
SrCalcium 2.35 %
CaAluminum 15.83 %
AlArsenic 19.05 %
AsPhosphorus 4.24 %
P Hydrogen 1.18 %
H Oxygen 40.67 %
O Fluorine 3.72 %
F Empirical Formula: Sr0.6Ca0.3Ba0.1Al3(AsO4)1.3(PO4)0.7(OH)4F·(H2O)
IMA Status:Approved IMA 1985
Locality:Clara mine, Oberwolfach, Black Forest, Germany.
Name Origin:Named for the chemical composition and it's relationship to goyazite.
Physical Properties: Cleavage:None
Color:greenish white, gray green, yellow, or light green.
Density:3.33 - 3.35, Average = 3.34
Diaphaniety:Transparent
Habits:Reniform - "Kidney like" in shape (e.g.. hematite)., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:4 - Fluorite
Luster:Vitreous (Glassy)
Streak:white
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