General Information:
Chemical Formula:
(Mg,Fe++)5Al(Si3Al)O10(OH)8
Composition:
(Molecular Weight = 595.22 gm)
Magnesium 15.31 % Mg
Aluminum 9.07 % Al
Iron 11.73 % Fe
Silicon 14.16 % Si
Hydrogen 1.35 % H
Oxygen 48.38 % O
Empirical Formula:
Mg3.75Fe2+1.25Si3Al2O10(OH)8
Environment:
Contact, hydrothermal, and regional metamorphism of mafic minerals.
Locality:
Common world wide.
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
Physical Properties:
Cleavage:
[001] Perfect
Color:
blackish green, bluish green, white, yellowish green, or olive green.
Density:
2.55 - 2.75, Average = 2.65
Diaphaniety:
Transparent to translucent
Habits:
Massive - Fibrous - Distinctly fibrous fine-grained forms., Pseudo Hexagonal - Crystals show a hexagonal outline., Granular - Generally occurs as anhedral to subhedral crystals in mat rix.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
None.
Luster:
Vitreous - Pearly
Streak:
white
More details...