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Even the exploration of the phase space given by a large number N (N ≤ 61) of components but a limited number q (q ≤ 6) of elements Ei in e.g. metal oxides Ex1>(1)Ex2(2)…Exq(q)Oy is a demanding task and needs a combinatorial approach which, by setting up starting conditions for solid‐state reactions, is taking favour of efficient combinatorial functions. Estimations showed that within a single sample prepared by mixing N starting components, the number of local reaction centres (configurations) is exceeding the number of phase systems. A huge amount of about 1012 starting grains for a sample of one cm3 provides population of each configuration many times. The distribution for the grain size and the number of grains building up a configuration allow to explore compositional fields in phase diagrams of the order q. The single sample concept (SSC) is particularly of interest for property oriented syntheses, where e.g. magnetic materials are produced in minor quantities. Magnetic chromatography is applied to extract ferromagnetic materials formed by the SSC. A horizontal separator is presented and applied to extract new ferromagnetic Fe‐based oxides from SSC reaction mixtures.

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