Sturmanite
Ca6(Fe,Al,Mn)2(SO4)2B(OH)4(OH)1225(H2O)
wdx 
edx
thin film 
thin foil
xrf
edx
thin film
thin foil
xrf
Location
Dana Class
Strunz Class
| Element | WT% |
| Al | 0.71% |
| Cu | 1.47% |
| Si | 2.10% |
| Mn | 4.80% |
| Fe | 7.83% |
| S | 11.89% |
| Ca | 33.14% |
| O | 38.06% |
| Compound | WT% |
| Al2O3 | 1.35% |
| CuO | 1.84% |
| SiO2 | 4.48% |
| MnO | 6.20% |
| FeO | 10.08% |
| SO3 | 29.68% |
| CaO | 46.37% |
