The layered chloronitride semiconductor -HfNCl when partially intercalated with organosolvated Li shows superconductivity at 26 K, a value striking enough to demand some comparison with (La,Sr)₂CuO₄, etc. As with d⁸, d⁹, d¹⁰, so between d⁰, d¹, d² a sufficiently rapid shift occurs in the state level energies to allow a double-loading fluctuation to become resonant with E_F. This is effected (as ²Hf_IV^2-) within the manifestly heterogeneous environment of the Li-intercalated system. However, unlike the cuprate circumstance, there now occurs no strong negative-U ordering of on-site state energies to create any close analogue. Nonetheless, the much lower T_c of the corresponding Zr (4d) material would indicate some non-phononic `chemical' interpretation for the superconductivity. A scenario more like that advocated earlier for the Rb₃C₆₀ family of intercalated fullerenes looks more appropriate. This rests on disordered local homopolar bond behaviour, arising within the Hf-Hf array of the bisandwich -structure on intercalation.