General Information:
Chemical Formula:NaCaMn++3(AsO4)3
Composition:(Molecular Weight = 644.64 gm)Sodium 3.57 %
NaCalcium 6.22 %
CaManganese 25.57 %
MnArsenic 34.87 %
AsOxygen 29.78 %
O Empirical Formula: NaCaMn2+3(AsO4)3
Environment:Mn-rich member of a series with caryinite.
Locality:Sjo Mine, Grythytte Parish, Orebro, Sweden.
Name Origin:Named from the Latin for the element As, and Greek for 'more' because it adds to the number of related minerals already described.
Physical Properties: Cleavage:[???] Good
Color:cherry or reddish brown.
Density:4.22 - 4.29, Average = 4.25
Diaphaniety:Opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:3.5 - Copper Penny
Luster:Greasy (Oily)
Streak:yellowish brown
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