The Journal of Geology, Vol. 51, No. 1 (Jan. - Feb., 1943), pp. 1-16 (16 pages) The phase-equilibrium relationships at atmospheric pressure and high temperatures in the systems albite-sphene, ...

Feldspars represent a group of rock forming minerals that are highly abundant on Earth and make up roughly 60 per cent of Earth's crust. The most common feldspars are anorthite, (CaSi2Al2O8 ...

In the one-phase region of plagioclase solid solution, considerable ordering (Eberhard, MacKenzie) occurs before the two-phase regions are encountered. Inversions to monalbite solid solution and ...