Fairchildite

General Information:
 Chemical Formula:
K2Ca(CO3)2
 Composition:
(Molecular Weight = 238.29 gm)
Potassium 32.82 % K 
Calcium 16.82 % Ca
Carbon 10.08 % C 
Oxygen 40.29 % O 
 Empirical Formula:
K2Ca(CO3)2
 Environment:
Dimorph with butschliite. The samples are fused wood-ash clinkers that occurs in partly burned fir and hemlock trees in many national parks and forest in the western United States.
 Name Origin:
Named after John Gifford Fairchild (1882-1965), analytical chemist at the U. S. Geological Survey.
Physical Properties:
 Cleavage:
[0001] Good
 Color:
colorless.
 Density:
2.446
 Diaphaniety:
Transparent
 Habits:
Platy - Sheet forms (e.g. micas)., ,
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...