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Bennett T J , American Mineralogist , 65 (1980) p.353-354, Crystal structure of paradamite
Physical Properties of Paradamite
Cleavage:
{010} Perfect
Color:
Light yellow.
Density:
4.55
Diaphaneity:
Transparent
Hardness:
3.5 - Copper Penny
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Paradamite
Gladstone-Dale:
CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1657,KPDmeas= 0.1668,KC= 0.1653 Ncalc = 1.75 - 1.76