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Fleet M E , Acta Crystallographica, Section B , 31 (1975) p.183-187, The crystal structure of paratacamite, Cu2(OH)3Cl, Sample: Ordered structure, considered to be the true structure
View Additional jPOWD Structure files for Paratacamite
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Encrustations - Forms crust-like aggregates on matrix.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Hardness:
3 - Calcite
Luster:
Vitreous - Dull
Streak:
light green
Optical Properties of Paratacamite
Dichroism (e):
none.
Dichroism (w):
none.
Gladstone-Dale:
CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2243,KPDmeas= 0.2261,KC= 0.2196 Ncalc = 1.82 - 1.83
Optical Data:
Uniaxial (+), w=1.843, e=1.848, bire=0.0050.
Calculated Properties of Paratacamite
Electron Density:
Bulk Density (Electron Density)=3.60 gm/cc note: Specific Gravity of Paratacamite =3.77 gm/cc.
Fermion Index:
Fermion Index = 0.0063592515 Boson Index = 0.9936407485
Photoelectric:
PEParatacamite = 28.34 barns/electron U=PEParatacamite x rElectron Density= 102.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Paratacamite is Not Radioactive