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Sabelli C , American Mineralogist , 67 (1982) p.388-393, Campigliaite, Cu4Mn(SO4)2(OH)6.4H2O, a new mineral from Campiglia Marittima,, Tuscany, Italy II. Crystal structure
Physical Properties of Campigliaite
Cleavage:
{100} Perfect
Color:
Light blue, Pink.
Density:
3
Diaphaneity:
Transparent
Luster:
Vitreous (Glassy)
Streak:
blue white
Optical Properties of Campigliaite
Gladstone-Dale:
CI meas= 0.066 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.085 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2062,KPDmeas= 0.2103,KC= 0.2253 Ncalc = 1.68 - 1.69