The 9 rir ~ai~ of the BiPbO~F ~ndu~ were e~mined by ~m of impedan~ sp~l r~Opy and de ~olafi~tion t ech niq~ ~uorinc wa, ~own t o be the main mobile spe~e~ Cmml st r aaa~ invea~tion~ we~ ~o~ed u sin~ X.my ~ingle c~l =d nem~ ~et diffracuo~. Cations a~ IocM~ in the 2d silr of the A-La~O~ type ~t ~c1~rr ~hile a ni~s a~ dlstd~ ~,r over the ]a, 2~ 6i =d 6h posilion~ of the P]ml S~ ~.
A~i~g ~ th~ floofi~ ]oentlon ~nfi~ by a ~F NMR exp 9 a fl~ori~ migrad0n mechanism is 0ro~&
- Zut~duedo~ ~ing fluon~e compound* I I L H~evcr, oxyfluorides can Mac exhibit fluorine mobility. Talfing into A lot of ~rk has already be~ aevot~d to the de-a~ount their froqu~tly highest stabdity and an ~velopment of mlid electrolyte oxygen gauges. One of pected beUer sel~livit y, we decided 1o investigate tba main aans of the~e r~careh progta~ is to oh-bismmh-based oxyfluorJde~, lain a lower working lempnrat~e for the~ devices.
In a previous paper 12L we ~ported on the ex-From this !:,oint o['vlew, bismuth-based oxygen ~n-istenee of a large hexagonal ~lid 5olutinn domain dueto~ are particularly attractive. Their eonductiv-(trigonal symmetry) bel~glng to the Bi20~-PbOityva[ueisusually~ralorde~ofmagaltudelarger PbF~ system. Conductivity m~surement~ perthan the zlr~nia4~a~.ed compounds at the same tern-fo~i on such materials of various compositions peratu~.Asa~mequen~,seveml ncwphaseghave led to a values standing in the ~nge 3โข -s to already been proposed as ~linble ~ndidales. H~-2 โข 10 -~ Q-I ~-* at 300~C, ever, their u~ remains llmited ~n medium temper-
The pre~at paper dea/s l~ith the ~ults of new ature range (300-600~ Substitming oxygen by electriml measments, X-ray single crystal and fluori~ in the electrolyte could ba a way to over-high-temFerature powd~ neut ~r,-diff~et ion expercotnethisiimitatinn. Asamatteroff~t.fluolineac.
iments perfo~d on a sample with composition tivity in such materials was shown to be oxygen-BiPbO2F. wtlich was selected for its very simple pressure dependent, leading to re]labia mcasur~ composition. meats.