Ankerite
Ca(Fe, Mg, Mn)(CO3)2
wdx 
edx
thin film 
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Brownley Hill mine, Nenthead, Cumbria
Dana Class
14.02.01.02
Strunz Class
05.AB.10
| Element | WT% |
| Mn | 1.63% |
| Mg | 3.38% |
| Fe | 11.00% |
| C | 14.15% |
| Ca | 18.78% |
| O | 51.05% |
| Compound | WT% |
| MnO | 2.1% |
| MgO | 5.61% |
| FeO | 14.15% |
| CO2 | 51.86% |
| CaO | 26.28% |
