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%.

H2O was deetermined by EA 1108 Carlo Erba ( gas cromatographer).