General Information:
Chemical Formula:
(Zn,Co,Ni)6(SO4)(OH,Cl)10·5(H2O)
Composition:
(Molecular Weight = 772.29 gm)
Zinc 33.87 % Zn
Cobalt 7.63 % Co
Nickel 7.60 % Ni
Hydrogen 2.35 % H
Sulfur 4.15 % S
Chlorine 9.18 % Cl
Oxygen 35.22 % O
Empirical Formula:
Zn4CoNi(SO4)(OH)8Cl2·5(H2O)
Environment:
Secondary mineral in the zone of oxidation.
IMA Status:
Approved IMA
Locality:
Cap Garrone mine, Var, France.
Name Origin:
Named for Andre Guarino, French mineral collector.
Physical Properties:
Cleavage:
[001] Perfect
Color:
pink or deep pink.
Density:
2.8
Diaphaniety:
Transparent
Habits:
Aggregates - Made of numerous individual crystals or clusters., Thin - Flat dimensioned crystals., Hexagonal - Six-sided crystal shape in cross-section or habit.
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Streak:
light pink
More details...