Perovzalates: a family of perovskite-related oxalates.
Dalton Trans
; 48(38): 14461-14466, 2019 Oct 14.
Article
in En
| MEDLINE
| ID: mdl-31524905
ABSTRACT
A family of hybrid Perovskite-oxalates ("Perovzalates") of general composition AILi3MII(C2O4)3 (A = K+, Rb+, Cs+; M = Fe2+, Co2+, Ni2+) are presented. All eight new compounds are isostructural with the previously reported examples NH4Li3Fe(C2O4)3 and KLi3Fe(C2O4)3, crystallising in the rhombohedral space group R3[combining macron]c, with aâ¼11.3-11.6 Å, câ¼14.8-15.2 Å. In contrast to other families of "hybrid perovskites" such as the formates, these compounds can be regarded as closer structural relatives to inorganic (oxide) perovskites, in the sense that they contain direct linkages of the octahedral sites via bridging oxygen atoms (of the oxalate groups). It is of note, therefore, that monoatomic cations as large as Cs+ can be incorporated into the perovskite-like A sites of this structure type, which is not feasible in traditional ABO3 perovskites; indeed CsLi3Ni(C2O4)3 appears to exhibit the 'mostly tightly bound' 12-coordinate Cs+ ion in an oxide environment, according to a bond valence analysis.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Dalton Trans
Journal subject:
QUIMICA
Year:
2019
Document type:
Article
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