General Information:
Chemical Formula:
(K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72·30(H2O)
Environment:
Ca-rich xenoliths in leucite tephrite lava.
IMA Status:
Approved IMA 1991
Locality:
Bellberg volcano, Mayen, Laacher See area, Eifel, Germany.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
None
Color:
colorless or white.
Density:
2.2
Diaphaniety:
Transparent
Habits:
Pyramidal - Crystals are shaped like pyramids., ,
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
white
More details...