1. 
   Romanèchite
   Romanèchite ((Ba,H2O)2(Mn+4,Mn+3)5O10) is the primary constituent of psilomelane, which is a mixture of minerals. Most psilomelane is not pure romanechite, so it is incorrect to consider them synonyms. Romanèchite is a valuable ore of manganese, which is used in steelmaking. It has a monoclinic c...
   Found op http://en.wikipedia.org/wiki/Romanèchite
   
   
2. 
   romanechite
   barium and manganese oxide [(Ba, H2O)2(Mn4+, Mn3+)5O10], an important ore mineral of manganese. A secondary mineral formed under surface conditions, ...
   Found op http://www.britannica.com/eb/a-z/r/64
   
   

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