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Konnert J A , Clark J R , Christ C L , Zeitschrift fur Kristallographie , 132 (1970) p.241-254, Crystal structure of fabianite, CaB3O5(OH), and comparison with the, structure of its syntheic dimorph, Locality: salt deposits near Diepholz, Germany
Physical Properties of Fabianite
Cleavage:
{011} Indistinct
Color:
Colorless.
Density:
2.77
Diaphaneity:
Transparent
Hardness:
6 - Orthoclase
Luminescence:
Fluorescent, Short UV=brownish yellow, Long UV=brownish yellow.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Fabianite
Gladstone-Dale:
CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2265,KPDmeas= 0.2282,KC= 0.22 Ncalc = 1.61