Freibergite Subgroup from
Canada | |
| Petruk, W., Harris, D. C., Stewart, J. M. (1969) Langisite, a new mineral, and the rare minerals cobalt pentlandite, siegenite, parkerite, and bravoite from the Langis mine, Cobalt-Gowganda area, Ontario, Canada. The Canadian Mineralogist, 9 (5) 597-616 |
| Reiner Mielke 2012 |
Langis Mine, Casey Township, Cobalt Area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada