The NASICON-ty
pe com
pound
La
1/3Zr
2(PO
4)
3 has been studied by therma
l X-ray di
ffraction. It was
found to exhibit, around 1000
![](/images/entities/deg.gi<font color=)
f">C, a reversib
le
phase transition
from
P![](/images/entities/thremacr.gi<font color=)
f"> to
P![](/images/entities/thremacr.gi<font color=)
f">
c1 due to a modi
fication o
fthe
lanthanum distribution in the [Zr
2(PO
4)
3]
- network. This evo
lution was con
firmed by
31P NMR ex
periments
per
formed on quenched La
1/3Zr
2(PO
4)
3 sam
ples (
T = 700 and 1000
![](/images/entities/deg.gi<font color=)
f">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.gi<font color=)
f">C, con
firming the La
3+ mobi
lity in the NASICON network.