General Information:
Chemical Formula:
NaCl
Composition:
(Molecular Weight = 58.44 gm)
Sodium 39.34 % Na
Chlorine 60.66 % Cl
Empirical Formula:
NaCl
Environment:
Marine or continental evaporite deposits.
Locality:
World wide in sedimentary basins.
Name Origin:
From the Greek halos, meaning "salt" and lithos meaning "rock."
Physical Properties:
Cleavage:
[100] Perfect, [010] Perfect, [001] Perfect
Color:
white, clear, light blue, dark blue, or pink.
Density:
2.17
Diaphaniety:
Transparent
Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., Granular - Generally occurs as anhedral to subhedral crystals in matrix., Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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