NOVELTY - A composition (C1) comprises intentionally added mixed-metal oxide pigment particles having a McConnellite crystal structure.    USE - In an electronic component; solar cell; for coating substrate e.g. metal, glass, enamel or ceramic; in an automotive body panel (claimed); in automotive paints, plastics and other coatings and finishes; to provide color or a special effect in glass materials including generally, vitreous inorganic materials, such as bulk glasses, glazes and/or glass enamels; to produce inks; and to fashion coatings useful in radio frequency shielding.    ADVANTAGE - The invention provides mixed-metal oxide special effect pigments that can be incorporated into optically thin binder systems to produce a special effect appearance that is superior, to the 'metal flake' appearance presently achievable using conventional special effect pigments. Unlike conventional metal flake effect pigments, the special effect pigments tend to be darker in color and thus do not lighten or wash out the colors of the optically thin binders in which they are dispersed, or the substrate which they cover. This allows for the preparation of darker colored metal flake coatings than previously obtainable using conventional metal flake effect pigments. The composition can be used to color a bulk object composed of an organic resin.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an electronic component comprising a fired or cured coating, containing, prior to firing or curing, the composition (C1);    (2) a solar cell comprising a semiconductor including the composition (C1) where the mixed-metal oxide further comprises a dopant (not greater than 1 mol.%);    (3) a formulation (F1) comprising the composition (C1) dispersed in a binder system;    (4) a coated metal substrate comprising a coating, where the coating comprises, prior to curing or firing, the formulation (F1);    (5) an automotive body panel comprising, prior to curing, the formulation (F1);    (6) preparation of a pigment invovling providing a mixture of precursor compounds comprising copper atoms, chromium atoms, and oxygen atoms; and calcining the mixture to produce the pigment, where the pigment comprises at least 10 wt.% of particles having a McConnellite crystal structure;    (7) a vitreous inorganic composition (C2) comprising an intentionally added mixed-metal oxide pigment including particles having a McConnellite crystal structure; and    (8) a substrate coated with a coating comprising, prior to firing, an intentionally added mixed-metal oxide pigment including particles having a McConnellite crystal structure.