The investigations in the Department of Inorganic chemistry and technology were directed in the field of the syntheses of new inorganic materials with specific properties and in the development of environment friendly technologies. New synthetic routes for the preparation of binary fluorides (e.g.. MnF3, MnF4, CoF3, BiF3, Pd2F6, PdF4, SmF3, LaF3) and ternary compounds of the transition metals in a high oxidation state were developed. Reactions, performed at supercritical conditions of the solvent and/or one or more reactants (Ca(AsF3)(AsF6)2) and reactions in nonaqueous media (HF, AsF3) were studied. New compounds of fluoroarsenates(V) (PbFAsF6, CuFAsF6, Pd(AsF6)2) and fluoroantimonates(V) (ASb2F11 (A - K, Cs, Ag), Mn(SbF6)2), fluoroarsenates(III) (MAs4F13 (M - NH4, Rb, Cs), (M(NH3)4)AsF4 (M - NH4, K, Rb, Cs), (M(NH3)4)As4F13 (M - NH4, K)) and mixed fluoroantimonates(III)-fluoroarsenates(III), (MAsSbF7 (M - NH4, K, Rb, Cs), MAs3SbF13 (M - Rb, Cs)) were prepared. Syntheses of the Ag(I)Ag(III)F4 and compounds of the type (Ag(II)Fplus)2Ag(III)F4-MF6- (M - As, Sb, Pt, Au, Ru) are the results of the reactions with the strongest known oxidizers (cationic Ni(IV) and Ag(III)). The investigations of the silver fluorides as potential high-temperature superconductors materials should be mentioned. Special emphasis was given to the study of donor and acceptor properties of the rare earth fluorides and the synthesis of new fluorolanthanoides, which represent potential precursors for new coordination chemistry of lanthanides. Coordination compounds of the type: (M(L)n)(AF6)m (M - lanthanide, transition metal or alkaline earth metal, A - As, Bi, Sb; "L" is a ligand: XeF2, HF, AsF3 or OPF3) were synthesised. The isolation of the alkaline earth compounds with XeF2 as a ligand should be emphasized. The synthesis of new -onium ions and their compounds were also studied. These compounds are used as catalysts, reagents and electrophilic reagents at syntheses in chemistry (H3OM(AF6)3 (A - As, Sb M - metal(II)). H3Oplus cations were replaced with other single valence cations (e.g. NH4plus, O2plus, NOplus). New hydrazinium fluorometalates were synthesized, which are interesting due to the investigation of proton tunnelling. Reaction conditions for the synthesis of the arylsulfur pentafluorides in radio-frequency plasma were determined. New graphite fluorides, which are used as materials for lithium batteries, were prepared with the use of high-energy oxidizers (KAgF4, K2NiF6, K2PdF6, K2MnF6, Cs2CoF6, Cs2CuF6) and F2 in anhydrous HF as a solvent or with the use F2, ClF3 and NF3 at the temperatures from 200oC to 500oC. During the research of fluorinated catalytic materials (aerogels/xerogels) their influence on the reactions in the gas phase was investigated. Pure or doped aerogels or xerogels on the basis of the chromium or aluminium oxide were prepared. Active catalysts were prepared with the fluorination of these compounds. Catalytic dehydroclorination of CCl2FCF3, the final step of the process proposed for converting the ozone depleting CCl2FCClF2 into an environmentally more acceptable product, CH2FCF3, was investigated. The highest selectivity was achieved with palladium on fluoride supports beta-AlF3 or MgF2. In the field of applied research a non-stationary model of chemical processes was developed. In the frame of the EU project "Low cost FGD", together with the partners, a rare complex, three-dimensional model was developed. Simultaneously aerodynamics, complex hydrodynamics and chemical reactions/equilibriums in real industrial desulphurisation plant of an arbitrary geometry were utilized.