Preparation and characterization of new perovskites containing Ir(VI) and Ir(V) [BaM0.50Ir0.50O2.75 and BaM0.25Ir0.75O3 (M = Li or Na)]

Duk Young Jung; Gérard Demazeau; J. Etourneau; M. A. Subramanian

doi:10.1016/0025-5408(94)00115-4

Preparation and characterization of new perovskites containing Ir(VI) and Ir(V) [BaM_0.50Ir_0.50O_2.75 and BaM_0.25Ir_0.75O₃ (M = Li or Na)]

Duk Young Jung
, Gérard Demazeau
, J. Etourneau
, M. A. Subramanian

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

New Ir(VI) and Ir(V) containing perovskites oxides of the type, BaM_0.5Ir_0.5O_2.75 and BaM_0.25Ir_0.75O₃ (M = Na or Li) have been synthesized under high oxygen pressure conditions using the thermal decomposition of KClO₃ in a belt apparatus. These materials have been characterized by X-ray diffraction, iodometric titration, and magnetic susceptibility measurements. BaM_0.25Ir_0.75O₃ (M = Na,Li) phases do not show 1:3 type ordering of M and Ir cations at the octahedral sites of the perovskite structure. The physico-chemical characterization of the prepared iridium perovskites show that the structure depends on synthetic conditions employed, the oxidation state of iridium and the coordination of Irⁿ⁺ (n = 5, 6). The ionic radii of the counter cations, M (Na or Li), also play an important role in the stabilization of a particular structure by altering the tolerance factor.

Original language	English
Pages (from-to)	113-123
Number of pages	11
Journal	Materials Research Bulletin
Volume	30
Issue number	1
DOIs	https://doi.org/10.1016/0025-5408(94)00115-4
State	Published - Jan 1995
Externally published	Yes

Access to Document

10.1016/0025-5408(94)00115-4

Cite this

@article{8bf78ed888be4043b200768832634a81,

title = "Preparation and characterization of new perovskites containing Ir(VI) and Ir(V) [BaM0.50Ir0.50O2.75 and BaM0.25Ir0.75O3 (M = Li or Na)]",

abstract = "New Ir(VI) and Ir(V) containing perovskites oxides of the type, BaM0.5Ir0.5O2.75 and BaM0.25Ir0.75O3 (M = Na or Li) have been synthesized under high oxygen pressure conditions using the thermal decomposition of KClO3 in a belt apparatus. These materials have been characterized by X-ray diffraction, iodometric titration, and magnetic susceptibility measurements. BaM0.25Ir0.75O3 (M = Na,Li) phases do not show 1:3 type ordering of M and Ir cations at the octahedral sites of the perovskite structure. The physico-chemical characterization of the prepared iridium perovskites show that the structure depends on synthetic conditions employed, the oxidation state of iridium and the coordination of Irn+ (n = 5, 6). The ionic radii of the counter cations, M (Na or Li), also play an important role in the stabilization of a particular structure by altering the tolerance factor.",

author = "Jung, \{Duk Young\} and G{\'e}rard Demazeau and J. Etourneau and Subramanian, \{M. A.\}",

year = "1995",

month = jan,

doi = "10.1016/0025-5408(94)00115-4",

language = "English",

volume = "30",

pages = "113--123",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Ltd",

number = "1",

}

TY - JOUR

T1 - Preparation and characterization of new perovskites containing Ir(VI) and Ir(V) [BaM0.50Ir0.50O2.75 and BaM0.25Ir0.75O3 (M = Li or Na)]

AU - Jung, Duk Young

AU - Demazeau, Gérard

AU - Etourneau, J.

AU - Subramanian, M. A.

PY - 1995/1

Y1 - 1995/1

N2 - New Ir(VI) and Ir(V) containing perovskites oxides of the type, BaM0.5Ir0.5O2.75 and BaM0.25Ir0.75O3 (M = Na or Li) have been synthesized under high oxygen pressure conditions using the thermal decomposition of KClO3 in a belt apparatus. These materials have been characterized by X-ray diffraction, iodometric titration, and magnetic susceptibility measurements. BaM0.25Ir0.75O3 (M = Na,Li) phases do not show 1:3 type ordering of M and Ir cations at the octahedral sites of the perovskite structure. The physico-chemical characterization of the prepared iridium perovskites show that the structure depends on synthetic conditions employed, the oxidation state of iridium and the coordination of Irn+ (n = 5, 6). The ionic radii of the counter cations, M (Na or Li), also play an important role in the stabilization of a particular structure by altering the tolerance factor.

AB - New Ir(VI) and Ir(V) containing perovskites oxides of the type, BaM0.5Ir0.5O2.75 and BaM0.25Ir0.75O3 (M = Na or Li) have been synthesized under high oxygen pressure conditions using the thermal decomposition of KClO3 in a belt apparatus. These materials have been characterized by X-ray diffraction, iodometric titration, and magnetic susceptibility measurements. BaM0.25Ir0.75O3 (M = Na,Li) phases do not show 1:3 type ordering of M and Ir cations at the octahedral sites of the perovskite structure. The physico-chemical characterization of the prepared iridium perovskites show that the structure depends on synthetic conditions employed, the oxidation state of iridium and the coordination of Irn+ (n = 5, 6). The ionic radii of the counter cations, M (Na or Li), also play an important role in the stabilization of a particular structure by altering the tolerance factor.

UR - https://www.scopus.com/pages/publications/0029229911

U2 - 10.1016/0025-5408(94)00115-4

DO - 10.1016/0025-5408(94)00115-4

M3 - Article

AN - SCOPUS:0029229911

SN - 0025-5408

VL - 30

SP - 113

EP - 123

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 1

ER -

Preparation and characterization of new perovskites containing Ir(VI) and Ir(V) [BaM_0.50Ir_0.50O_2.75 and BaM_0.25Ir_0.75O₃ (M = Li or Na)]

Abstract

Access to Document

Other files and links

Fingerprint

Cite this