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Betafite (of Hogarth 1977) from Bearpaw Mts, Hill Co., Montana, USA

USA
 
  • Montana
    • Hill Co.
www.koeln.netsurf.de/~w.steffens
Chakhmouradian A.R. & Mitchell R.H. (1999) Primary, agpaitic and deuteric stages in the evolution of Accessory Sr, REE, Ba and Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts., Montana, Mineral. Petrol., 67: 85-110.


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