General Information:
Chemical Formula:
Ca(UO2)2[Si5O12(OH)2]·4.5(H2O)
Composition:
(Molecular Weight = 1,078.71 gm)
Calcium 3.72 % Ca
Uranium 44.13 % U
Silicon 15.62 % Si
Hydrogen 0.93 % H
Oxygen 35.60 % O
Empirical Formula:
Ca(UO2)2Si6O15·5(H2O)
Environment:
Secondary, oxidation product.
IMA Status:
Approved IMA 1959
Locality:
Haiwee Reservoir, Inyo Co. California.
Name Origin:
Named after it's locality.
Physical Properties:
Cleavage:
[001] Good
Color:
greenish yellow or light yellow.
Density:
2.86 - 3.35, Average = 3.1
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Spherical - Spherical, rounded aggregates., Aggregates - Made of numerous individual crystals or clusters.
Hardness:
3.5 - Copper Penny
Luster:
Pearly
Streak:
white
More details...