“…A novel feature in the growth of alloy semiconductors, particularly Ino.5Gao.5P as well as (Al,Gal-+)0.52In0.48P is the appearance of ordering on the cation sublattice. The alloy ordering was first observed in the Al,Gal-,As [63] alloy system and has since been seen in In,Gal-,As [64], Ga,Inl-,P [65], GaAs,Sbl-, [66], and other systems. Alloy ordering in the Ga,Inl-,P system is characterized by the segregation of Ga and In to alternate <111> planes [65].…”