FRIEDELITE GROUP
MINERAL GROUPS guide
ferropyrosmalite
(Fe,Mn)
8
Si
6
O
15
(OH,Cl)
10
friedelite
Mn
8
Si
6
O
15
(OH,Cl)
10
manganpyrosmalite
(Mn,Fe)
8
Si
6
O
15
(OH,Cl)
10
mcgillite
(Mn,Fe)
8
Si
6
O
15
(OH)
8
Cl
2