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Brownmillerite

Type Locality
Mayener Feld, Southern lava flow, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany
Mineral Data
Ca2(Al,Fe3+)2O5
Strunz: 
4.AC.10
Physical Properties
Crystal System: 
Orthorhombic
Hardness: 
0.0
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