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Hydroxymanganopyrochlore

Type Locality
In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany
Mineral Data
(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)
Physical Properties
Hardness: 
0.0
Tenacity: 
brittle