Jouravskite

General Information:
 Chemical Formula:
Ca3Mn++++(SO4,CO3)2(OH)6·12(H2O)
 Composition:
(Molecular Weight = 667.50 gm)
Calcium 18.01 % Ca
Manganese 8.23 % Mn
Hydrogen 4.53 % H 
Carbon 0.90 % C 
Sulfur 7.21 % S 
Oxygen 61.12 % O 
 Empirical Formula:
Ca3Mn4+(SO4)1.5(CO3)0.5(OH)6·12(H2O)
 IMA Status:
Approved IMA 1965
Physical Properties:
 Cleavage:
[100] Good
 Color:
green orange or greenish yellow.
 Density:
1.95
 Diaphaniety:
Transparent
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous (Glassy)
 Streak:
greenish white
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