TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The residue is heated at 300-1000 degrees C, preferably 700-800 degrees C for at least 15 minutes, 30 minutes, 1 hour, 2 hours or 3 hours and at most 24 hours, 12 hours, 6 hours or 4 hours. The step (d) takes place in an atmosphere with at least 25 vol.%, preferably approximately 100 vol.% of oxygen content. The process uses a zinc alkali metal-organic compound and a metal organic zinc cubane compound. The process further uses a metal organic zinc compound containing an alkylzincalkoxide group. Preferred Components: The zinc-alkali metal-organic compound is a monolithium-alkylzinkalkoxide of formula (I). The zinc alkali metal organic compound is of formula ((CH3)3Zn3Li(tetrahydrofuran)(OC(CH3)3)4) and the metal organic zinc compound is of formula ((CH3ZnOC(CH3)3)4). The alkali atom is lithium, where the lattice places of the crystal scaffolding is occupied by doped zinc oxide.thf = tetrahydrofuran;R = an alkyl residue, which is a linear alkyl residue, preferably CH3 or C2H5; andR1a = an alkyl residue, which is a non-linear alkyl residue, preferably isopropyl- or tert.butyl residue.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: In the process, the residue is heated in a tubular furnace.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The organic solvent is a polar solvent, preferably tetrahydrofuran. SPECIFIC COMPOUNDS - 1 Compound (I) is disclosed e.g. lithium metal-doped zinc oxide compound of formula (Ia).    EXAMPLE - Zinc alkali metal-organic compound of formula (((CH3)3Zn3K(tetrahydrofuran)(OC(CH3)3)4)) (3.9 g) was dissolved in tetrahydrofuran (20 ml), reacted with lithium tetrafluoroborate (0.638 g) and stirred for 2 hours. The volatile components were removed in the vacuum (0.01 mbar) and the resulting white raw product was treated with dichloromethane. After filtration, the clear, pale solution in the vacuum was concentrated to obtain (((CH3)3Zn3Li(tetrahydrofuran)(OC(CH3)3)4)) (3.2 g).