  The concepts of "Rational Design of Superconductivity" from Periodic Table
properties were proposed in an earlier paper (ArXiv: 1204.0233). We had shown
latter too that high-Tc superconductivity exists in the Z=7.333 family with
Ne=2.667, of which MgB2 is a member. Here we propose and show that compounds
with Z = 5.667 and Ne=2.333 will meet the conditions for high-Tc
superconductivity similar to the Z = 7.333 family. The predicted Tcs for the
ternary and quaternary systems of the Z =5.667 family would fall in the range
40K - 100K. We give material specific examples of some such possible rational
designs of high-Tc superconductivity.
