Sacrofanite

General Information:
 Chemical Formula:
(Na,Ca,K)9Si6Al6O24[(OH),(SO4),(CO3),Cl)]4·n(H2O)
 Environment:
In a cavity of an ejecta block.
 IMA Status:
Approved IMA 1980
 Locality:
Mt. Sabatini, Sacrafano volcano area, Latium, Italy.
 Name Origin:
Named for the locality.
Physical Properties:
 Cleavage:
[0001] Perfect, [0110] Perfect
 Color:
colorless.
 Density:
2.42
 Diaphaniety:
Transparent
 Habits:
Hexagonal - Six-sided crystal shape in cross-section or habit., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
 Hardness:
5.5-6 - Knife Blade-Orthoclase
 Luster:
Vitreous (Glassy)
 Streak:
white
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