General Information:
Chemical Formula:
Na2LiAlF6
Composition:
(Molecular Weight = 193.89 gm)
Sodium 23.71 % Na
Lithium 3.58 % Li
Aluminum 13.92 % Al
Fluorine 58.79 % F
Empirical Formula:
Na2LiAlF6
Environment:
Found in a late-stage breccia pipe that cuts the Zapot amazonitic microcline - topaz - zinnwaldite granitic pegmatite.
IMA Status:
Approved IMA 1998 (Dana # Added)
Locality:
Gillis Range, Mineral County, Nevada, U.S.A.
Name Origin:
Named after William B. "Skip" Simmons (b. 1943), University of New Orleans, New Orleans, Louisiana, U.S.A., specialist in the mineralogy and petrology of granitic pegmatites, especi ally those of Colorado and of NYF type
Physical Properties:
Cleavage:
None
Color:
pale buff cream.
Density:
3.05
Diaphaniety:
Transparent to translucent
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Inclusions - Generally found as inclusions in other minerals.,
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Greasy (Oily)
Streak:
white
More details...