General Information:
Chemical Formula:
C
Composition:
(Molecular Weight = 12.01 gm)
Carbon 100.0 % C
Empirical Formula:
C
Environment:
Associated with diamond in the Canyon Diablo, Goalpara, and Allan Hills 77283 meteorites. Also in diamond-bearing placers.
IMA Status:
Approved IMA 1967
Locality:
Tunguska impact site, Russia. Other world-wide impact sites.
Name Origin:
Named for Kathleen Lonsdale (1903-1971), English crystallographer.
Physical Properties:
Cleavage:
[???] Perfect
Color:
brownish black or light brownish yellow.
Density:
3.3 - 3.52, Average = 3.41
Diaphaniety:
Translucent to Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
Hardness:
7-8
Luster:
Adamantine
Streak:
brownish yellow
More details...