General Information:
Chemical Formula:
Na21(SO4)7F6Cl
Composition:
(Molecular Weight = 1,304.67 gm)
Sodium 37.00 % Na
Sulfur 17.20 % S
Chlorine 2.72 % Cl
Oxygen 34.34 % O
Fluorine 8.74 % F
Empirical Formula:
Na21(SO4)7F6Cl
Environment:
Continental evaporite deposits.
Locality:
Drill core from the lower salt member at Searles Lake, San Bernardino Co., California.
Name Origin:
Named for John Frank Schairer (1904-1970), American physical chemist, Geophysical Laboratory, Washington, DC, USA.
Physical Properties:
Cleavage:
[???] Indistinct
Color:
colorless.
Density:
2.61
Diaphaniety:
Transparent
Habits:
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals., ,
Hardness:
3.5 - Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...