The NASICON-ty
pe com
pound
La
1/3Zr
2(PO
4)
3 has been studied by therma
l X-ray diffraction. It wasfound to exhibit, around 1000
![](/images/entities/deg.gif)
C, a reversib
le
phase transition from
P![](/images/entities/thremacr.gif)
to
P
c1 due to a modification ofthe
lanthanum distribution in the [Zr
2(PO
4)
3]
- network. This evo
lution was confirmed by
31P NMR ex
periments
performed on quenched La
1/3Zr
2(PO
4)
3 sam
ples (
T = 700 and 1000
![](/images/entities/deg.gif)
C) and com
pared to room-tem
perature resu
lts. To com
plete this study, im
pedance s
pectrosco
py measurements were carried outbetween 330 and 730
![](/images/entities/deg.gif)
C, confirming the La
3+ mobi
lity in the NASICON network.