Phase composition (XRD) 
 Description: 
Dominant cristalline phase is quartz, furthermore present albite, microcline and illite.
 
 Chemical composition (XRF) 
| Element | Content [%] | 
|---|
 | Na2O | 0,94 | 
  | MgO | 0,76 | 
  | Al2O3 | 7,85 | 
  | SiO2 | 83,1 | 
  | P2O5 | 0,13 | 
  | K2O | 2,85 | 
  | CaO | 1,59 | 
  | TiO2 | 0,57 | 
  | Fe2O3 | 2,21 |