| Formula | Si | Al | Ti | Fe2 | Mn | Mg | Ca | Na | K | Cations | Ab | An | Or |
| 1 | 11.075 | 4.95 | 0 | 0.107 | 0 | 0.005 | 0.898 | 2.795 | 0.02 | 19.85 | 75.3 | 24.2 | 0.5 |
| 2 | 11.112 | 4.944 | 0 | 0 | 0 | 0 | 0.818 | 3.051 | 0.018 | 19.943 | 78.5 | 21 | 0.5 |
| 3 | 11.197 | 4.706 | 0 | 0 | 0 | 0.005 | 0.827 | 3.404 | 0.009 | 20.148 | 80.3 | 19.5 | 0.2 |
| 4 | 11.144 | 4.748 | 0 | 0.013 | 0 | 0 | 0.87 | 3.38 | 0.016 | 20.171 | 79.2 | 20.4 | 0.4 |