Mineralogical-geochemical and crystallochemical properties of ferriferous ochers from nickel-bearing crust of weathering, Uralian deposits

The results of mineralogical-geochemical, thermographical, and spectroscopic studies of ferriferous ochers from nickel-bearing crust of weathering, currently considered as promising natural pigment raw materials, are discussed. The most important criteria of quality of the raw materials are the degree of dispersion and crystallinity of iron oxide phases, ultimately resulted from geological conditions of weathering.