“…The condensation sequence of elements and compounds from a cooling cloud of solar composition has been calculated by Larimer [19], Lord [20] and Grossman [21], The early condensates (Table 2) are Al, Ca and Ti compounds such as gehlenite (Ca 2 Al 2 Si0 7 ), spinel (MgAl,^) and perovskite (CaTi0 3 ).…”