General Information:
Chemical Formula:(Na,Ca)8(Si68Al12)O160-29(H2O)
Composition:(Molecular Weight = 5,534.03 gm)Sodium 2.49 %
NaCalcium 1.45 %
CaAluminum 5.85 %
AlSilicon 34.51 %
SiHydrogen 1.06 %
H Oxygen 54.64 %
O Empirical Formula: Na6Ca2Si68Al12O160·29(H2O)
Environment:In cavites in dolorites.
IMA Status:Approved IMA 1995
Locality:The southwest crest, just below the summit of Mt. Adamson, Northern Victoria Land, Antarctica.
Name Origin:For the Italian Antarctic Station at Terranova Bay, Antarctica.
Physical Properties: Cleavage:[010] Perfect, [001] Parting
Color:colorless or bluish white.
Density:1.98 - 2.13, Average = 2.05
Diaphaniety:Transparent
Habits:Globular - Spherical, or nearly so, rounded forms (e.g. wavellite)., ,
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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