General Information:
Chemical Formula:
Ca2(Co,Mg)(AsO4)2·2(H2O)
Composition:
(Molecular Weight = 444.30 gm)
Calcium 18.04 % Ca
Magnesium 1.37 % Mg
Cobalt 9.95 % Co
Arsenic 33.73 % As
Hydrogen 0.91 % H
Oxygen 36.01 % O
Empirical Formula:
Ca2Co0.75Mg0.25(AsO4)2·2(H2O)
Environment:
Secondary arsenate mineral.
Locality:
Schneeberg, Saxony, Germany.
Name Origin:
Named for its dimorphic relationship with roselite.
Physical Properties:
Cleavage:
[010] Perfect
Color:
dark rose red.
Density:
3.71
Diaphaniety:
Transparent to Translucent
Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
Hardness:
3.5-4 - Copper Penny-Flourite
Luster:
Vitreous (Glassy)
Streak:
pale red
More details...