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Mayenite supergroup
[X
12
][T
14
][O
32-X
][(OH)
3X
][W
6-3X
]
X: [ 3+: Y ][ 2+: Ca, Sr ]
T: [ 4+: Si ][ 3+: Al, Fe ][ 2+: Mg]
W: [ 2-: O ][ 1-: Cl, F, OH ][ 0: [], H
2
O ]
[ W
6-3X
], where only X=0 is known.
[ W
6-3X
2-
]:
Mayenite group
[ W
6-3X
6-
]:
Wadalite group
System: Cubic
Group: (-4)3m, I(-4)3d