Hornblende


Rich in Mg - Rich in Fe
nα=1.630 - 1.678
nβ=1.637 - 1.697
nγ=1.644 - 1.704
δ= 0.014-0.026
2V= -(63-87)°

Thin section photos:
Hornblende in andesite, Kamchatka. PPL



No comments:

Post a Comment