InMnO[sub 3]: A new transition metal oxide with an unusual ABO[sub 3] structure

Journal Article · Wed Dec 30 00:00:00 EST 1992 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00053a037· OSTI ID:6309248

Giaquinta, D M; Loye, H.C. zur ^[1]

---

1. Massachusetts Inst. of Technology, Cambridge (United States)

The authors report the synthesis and structure of a new, unusual indium manganese oxide, InMnO[sub 3], with a hexagonal layered structure containing manganese in trigonal bipyramidal coordination. Several common ABO[sub 3] structural types are known, such as perovskite, corundum, ilmenite, and bixbyite, and radius ratio rules, such as Goldschmidt's tolerance factor, will generally predict which structural type will form for any given pair of cations. Two common ABO[sub 3] structural families are characterized by (1) A and B cations of approximately equal size and of a size suitable for octahedral coordination by oxygen and (2) an A cation comparable in size to O[sup 2[minus]], which together with oxygen can form AO[sub 3] closest-packed layers. Oxides of the first group tend to adopt sesquioxide structures, such as corundum ([alpha]-Al[sub 2]O[sub 3]) (a random distribution of cations in octahedral interstices, preferred by cations having the same oxidation state and/or similar radii) or ilmenite (an ordered cation distribution preferred by cations having different oxidation states and/or different radii). Oxides of the second group form linked BO[sub 6] octahedra and AO[sub 3] closest-packed layers, such as perovskite, BaNiO[sub 3], or hexagonal BaTiO[sub 3] type structures, as well as uncommon structural types, e.g., the tunnel structure of KSbO[sub 3]. InMnO[sub 3], intriguingly, is not a member of these known structural families. 32 refs., 1 fig., 1 tab.

• OSTI ID: 6309248
• Journal Information: Journal of the American Chemical Society; (United States), Vol. 114:27; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
INDIUM OXIDES
CRYSTAL STRUCTURE
MANGANESE OXIDES
CATIONS
CHEMICAL PREPARATION
DISTRIBUTION
LAYERS
OXIDATION
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
INDIUM COMPOUNDS
IONS
MANGANESE COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies