General Information:
Chemical Formula:Na4Ca(SO4)3·2(H2O)
Composition:(Molecular Weight = 456.26 gm)Sodium 20.16 %
NaCalcium 8.78 %
CaHydrogen 0.88 %
H Sulfur 21.08 %
S Oxygen 49.09 %
O Empirical Formula: Na4Ca(SO4)3·2(H2O)
Environment:Surface efflorescences on soils.
IMA Status:Approved IMA 1980
Locality:Sindo and Luanda, near Lake Victoria, Kenya.
Name Origin:Named for Hans P. Eugster (1925-1987), Suiss-American mineralogist, John Hopkins University, awarded the Roebling Medal, 1983.
Physical Properties: Color:colorless.
Density:2.5
Diaphaniety:Transparent
Habits:Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation., ,
Hardness:1-2 - Between Talc and Gypsum
Luster:Vitreous (Glassy)
Streak:white
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