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Kampf A R , Favreau G , European Journal of Mineralogy , 16 (2004) p.361-366, Jacquesdietrichite, Cu2[BO(OH)2](OH)3, a new mineral from the, Tachgagalt mine, Morocco: Description and crystal structure, Locality: Tachgagalt mine, Morocco
Physical Properties of Jacquesdietrichite
Cleavage:
{100} Perfect, {010} Good, {001} Good
Color:
Blue.
Density:
3.28
Diaphaneity:
Translucent
Fracture:
Flexible - Flexible fragments.
Habit:
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
2 - Gypsum
Luster:
Vitreous (Glassy)
Streak:
pale blue
Optical Properties of Jacquesdietrichite
Gladstone-Dale:
CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2116,KPDmeas= 0.2129,KC= 0.2086 Ncalc = 1.68 - 1.69