Phase equilibria in the La-Mg-Ge system at 500 °C and crystal structure of the new ternary compounds La11Mg2Ge7 and LaMg3−xGe2

La-Mg-Ge isothermal section at 500 °C and group-subgroup relation between the LaLi3Sb2 (parent type) and LaMg3−xGe2 (derivative) structures.