General Information:
Chemical Formula:
(Na,K)7Ca(Si6Al6)O24S1,5·(H2O)
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Good
Color:
yellow.
Density:
2.43
Diaphaniety:
Transparent to Translucent
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
light yellow
More details...