[4] V. Johnson, W. Jeitschko, J. Solid State Chem. 11 (1974) 161–166. [5] M. Palazzi, C. Carcaly, J. Flahaut, J. Solid State Chem. 35 (1980) 150–155. [6] M. Palazzi, S. Jaulmes, Acta Crystallogr. Sect. B Struct. Crystallogr. Cryst. Chem. 37 (1981) 1337–1339. [7] L.N. Kholodkovskaya, L.G. Akselrud, A.M. Kusainova, V.A. Dolgikh, B.A. Popovkin, Mater. Sci. Forum 133–136 (1993) 693–696. [8] A.M. Kusainova, P.S. Berdonosov, L.G. Akselrud, L.N. Kholodkovskaya, V.A. Dolgikh, B.A. Popovkin, J. Solid State Chem. 112 (1994) 189–191. [9] R. Pöttgen, D. Johrendt, Zeitschrift Fur Naturforsch. - Sect. B J. Chem. Sci. 63 (2008) 1135–1148. • Quaternary ZrCuSiAs and HfCuSiAs silicidoarsenides were firstly synthesized in 1974 by V. Johnson and W. Jeitschko [4]; • R3+T+S2-O2- oxysulfides (R – rare-earth elements, T – transition metals) were synthesized in 1980. They crystallize in the same ZrCuSiAs structural type and have been studied as promising oxide materials for solar cells with attractive optical properties and ionic conductivity [5,6]; • Oxychalcogenides Ln3+Cu+Ch2-O2- (Ln – Bi or lanthanides, Ch - chalcogenide) were synthesized at Moscow State University and Lviv State University in 1993. Only structural studies [7,8]; • 1990’s – R3+T2+Pn3-O2- oxypnictides (Pn – pnictide [nitrogen subgroup]) as potential high-Tc superconductors (but no superconductivity) [9];