For each mine we calculated the medium value of lattice parameter.                   

For each mine we calculated the medium value of chemical analyses (analysed 20 point ) by EMPA (Cameca CX 827).

Mn, Se, F, Rb are under detection limits except in few cases. Li and Be are not determined.            

Chemical analyses have been normalized at 85%.                  

It was impossible to calculate the water value because the sample quantity was too low.