Axially linear slopes of composition for delta crystals
\u201cDelta\u201d crystals are solid solutions of miscible materials with large lattice parameter differences which contain high concentration gradients in one direction (parallel to a lattice plane strongly diffracting X-rays). The system GaSb-InSb has been chosen as suitable for study. By means of a \u201cgradient projection method\u201d, the growth of nearly linear composition profiles with relatively steep slopes of the lattice parameter (up to (\u0394a/ ) / \u0394z = 8.3% cm-1), adjustable by the temperature gradient, have been performed. However, the grown ingots were not monocrystalline due to the use of too high a growth rate.