General Information:
Chemical Formula:(Co,Zn,Ni)6(SO4)(OH,Cl)10·8(H2O)
Composition:(Molecular Weight = 813.42 gm)Zinc 16.08 %
ZnCobalt 21.74 %
CoNickel 7.22 %
NiHydrogen 2.97 %
H Sulfur 3.94 %
S Chlorine 8.72 %
ClOxygen 39.34 %
O Empirical Formula: Co3Zn2Ni(SO4)(OH)8Cl2·8(H2O)
Environment:Secondary alteration mineral.
IMA Status:Approved IMA
Locality:Cap Garonne mine, Var, France.
Name Origin:Named for Therese Magnan for her contributions to knowledge about the Cap Garrone mine.
Physical Properties: Cleavage:[0001] Perfect
Color:pink or light pink.
Density:2.52
Diaphaniety:Transparent
Habits:Thin - Flat dimensioned crystals., Platy - Sheet forms (e.g. micas)., Spherical - Spherical, rounded aggregates.
Hardness:1.5-2 - Talc-Gypsum
Luminescence:Non-fluorescent.
Luster:Pearly
Streak:white
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