  Only several compounds bearing Ag(II) cation and other transition metal
cation have been known. Herein, we predict stability and crystal structures of
hypothetical ternary silver(II) fluorides with copper, nickel and cobalt in 1:1
stoichiometry at pressure range from 0 GPa up to 20 GPa within the frame of
Density Functional Theory. Calculations show that AgCoF4 could be synthesized
already at ambient conditions but this compound would host diamagnetic Ag(I)
and high-spin Co(III). However, at increased pressure ternary fluorides of
Ag(II) featuring Cu and Ni could be synthesized, in the pressure windows of
7-14 and 8-15 GPa, respectively. All title compounds would be semiconducting
and magnetically ordered.
