Pyrrhotite
Fe(1-x)S (x 0 to 0.2)
wdx 
edx
thin film 
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Cwm Dwyffor Mine, Pennant Valley, Gwynedd
Dana Class
02.08.10.01
Strunz Class
02.CC.10
| Element | WT% |
| S | 42.02% |
| Fe | 57.98% |
| Compound | WT% |
