Sr 9 La 2 (WO 6 ) 4 containing [WO 6 ] octa-hedra
A polycrystalline sample of Sr La (WO ) , nona-strontium dilanthanum tetra-kis-[orthotungstate(VI)], was prepared by heating a compacted powder mixture of SrCO , WO , and La O with an Sr:La:W molar ratio of 9:2:4 at 1473 K. X-ray crystal structure analysis was performed for a Sr La (WO ) single-crys...
Saved in:
| Published in | Acta crystallographica. Section E, Crystallographic communications Vol. 78; no. Pt 8; p. 766 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
England
01.08.2022
|
| Subjects | |
| Online Access | Get full text |
Cover
Loading…
| Summary: | A polycrystalline sample of Sr
La
(WO
)
, nona-strontium dilanthanum tetra-kis-[orthotungstate(VI)], was prepared by heating a compacted powder mixture of SrCO
, WO
, and La
O
with an Sr:La:W molar ratio of 9:2:4 at 1473 K. X-ray crystal structure analysis was performed for a Sr
La
(WO
)
single-crystal grain grown by reheating the sample at 1673 K. Sr
La
(WO
)
crystallizes with four formula units in the tetra-gonal space group
4
/
and is isotypic with Sr
(ReO
)
. Two W sites with site symmetries of are located at the center of isolated [WO
] octa-hedra, and four mixed (Sr/La) sites are surrounded by eight to twelve O atoms of the [WO
] octa-hedra. The structure of Sr
La
(WO
)
can be described on the basis of the double-perovskite structure with [WO
] and [(Sr/La)O
] polyhedra alternately placed, and a vacancy (□). |
|---|---|
| ISSN: | 2056-9890 2056-9890 |