The k absorption spectra of zirconium, molybdenum and selenium in ZrSe2 and MoSe2 have been recorded photographically using a Cauchois type bent crystal (mica) spectrograph. The absorption edge shifts are used along with the data for NbSe2 (Bhide and Bahl 1971J. Phys. Chem. Solids 32 1001) to propose bond schemes for these compounds
