Recent theories have proposed that life arose from primitive hydrothermal environments employing chemical reactions analogous to the reductive citrate cycle (RCC) as the primary pathway for carbon fixation. This chemistry ...
A large number of potassium-rich igneous rocks can be displayed as a contiguous set of mineral assemblages in a modified normative tetrahedron kalsilite-forsterite-larnite-quartz. Pairs of phases in subtetrahedra undergo ...