The triclinic nature of the low-temperature modification of LiSn2(PO4)
(3), heretofore considered as monoclinic, has been proved by detailed
indexing of its II-ray diffraction powder pattern. The triclinic chara
cter of most low-temperature polymorphs of NASICON-type LiMe2IV (PO4)(
3) is tentatively hypothesized, from this evidence and additional indi
cations, (C) 1997 Academic Press.