Formula
(repeating unit) Ca4Al6Si6O24CO3 Crystal system Tetragonal | Strunz classification 9.FB.15 Space group I4/m | |
 | ||
Category Tectosilicate < br/>Scapolite group Crystal class Dipyramidal (4/m)
(same H-M symbol) | ||
Meionite is a tectosilicate belonging to the scapolite group with the formula Ca4Al6Si6O24CO3. Some samples may also contain a sulfate group. It was first discovered in 1801 on Mt Somma, Vesuvius, Italy.
References
Meionite Wikipedia(Text) CC BY-SA