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Laueite supergroup
[ M1 ][ M2 ][ M3 ][(OH)
2
|( X O
4
)
2
],8H
2
O
M1: [ 2+: Fe, Mg, Mn, Ba ][ 3+: Fe ]
M2: [ 3+: Al, Fe ]
M3: [ 3+: Al, Fe ]
X: [ 5+: P, As ]
[ X ]
[ P
5+
]:
Laueite group
[ As
5+
]:
Maghrebite group
System: Triclinic