General Information:
Chemical Formula:
Na4Ca(SO4)3·2(H2O)
Composition:
(Molecular Weight = 456.26 gm)
Sodium 20.16 % Na
Calcium 8.78 % Ca
Hydrogen 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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