Contact, hydrothermal, and regional metamorphism of mafic minerals.
IMA Status:
Valid Species (Pre-IMA) 1851
Locality:
Common world wide. Link to MinDat.org Location Data.
Name Origin:
Clinochlore from the Greek klino - "oblique" and chloros - " green." Ripidolite from the Greek rhipis - "fan" and lithos - "stone." Pennine from the Pennine Alps, Italy
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Brown B E , Bailey S W , American Mineralogist , 48 (1963) p.42-61, Chlorite polytypism: II. Crystal structure of a one-layer Cr-chlorite, Note: variety called kammererite
Pseudo Hexagonal - Crystals show a hexagonal outline.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Clinochlore
Gladstone-Dale:
CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.059 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2058,KPDmeas= 0.2197,KC= 0.2188 Ncalc = 1.56 - 1.62
Optical Data:
Biaxial (+), a=1.571-1.588, b=1.571-1.589, g=1.576-1.599, bire=0.0050-0.0110, 2V(Calc)=0-36, 2V(Meas)=0-40. Dispersion r < v.
Pleochroism (x):
pale green, pale green, or colorless.
Pleochroism (y):
pale green, pale green, or colorless.
Calculated Properties of Clinochlore
Electron Density:
Bulk Density (Electron Density)=2.65 gm/cc note: Specific Gravity of Clinochlore =2.65 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEClinochlore = 4.59 barns/electron U=PEClinochlore x rElectron Density= 12.16 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Clinochlore is Not Radioactive
Clinochlore Classification
Dana Class:
71.04.01.04(71)Phyllosilicate Sheets of Six-Membered Rings