CaMnO2.5 and Ca2MnO3.5: New oxygen-defect perovskite-type oxides

K. R. Poeppelmeier; M. E. Leonowicz; J. M. Longo

doi:10.1016/0022-4596(82)90404-2

CaMnO_2.5 and Ca₂MnO_3.5: New oxygen-defect perovskite-type oxides

K. R. Poeppelmeier^*, M. E. Leonowicz, J. M. Longo

^*Corresponding author for this work

Chemistry

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

218 Scopus citations

Abstract

We found that when the precursors CaMnO₃ and Ca₂MnO₄ are reduced with any one of a variety of inorganic (H₂, NH₃) or organic (C₂H₄, C₃H₆) reducing agents between 300 and 500°C, topotactic reaction occurs to produce the ordered oxygen-defect phases CaMnO_2.5 and Ca₂MnO_3.5, respectively. Orthorhombic cell constants for CaMnO_2.5 are a = 5.43(1), b = 10.24(1), and c = 3.74(1) Å, and for Ca₂MnO_3.5 are a = 5.30(1), b = 10.05(1), and c = 12.24(1)Å. These compounds were characterized by powder X-ray diffraction, thermogravimetric analysis, magnetic susceptibility, and infrared spectroscopy. The reduced compounds reversibly oxidize to their respective precursor in oxygen at low temperatures.

Original language	English (US)
Pages (from-to)	89-98
Number of pages	10
Journal	Journal of Solid State Chemistry
Volume	44
Issue number	1
DOIs	https://doi.org/10.1016/0022-4596(82)90404-2
State	Published - Aug 1982

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/0022-4596(82)90404-2

Cite this

@article{c6119f4468154b0fa1b72796f4cb5ec6,

title = "CaMnO2.5 and Ca2MnO3.5: New oxygen-defect perovskite-type oxides",

abstract = "We found that when the precursors CaMnO3 and Ca2MnO4 are reduced with any one of a variety of inorganic (H2, NH3) or organic (C2H4, C3H6) reducing agents between 300 and 500°C, topotactic reaction occurs to produce the ordered oxygen-defect phases CaMnO2.5 and Ca2MnO3.5, respectively. Orthorhombic cell constants for CaMnO2.5 are a = 5.43(1), b = 10.24(1), and c = 3.74(1) {\AA}, and for Ca2MnO3.5 are a = 5.30(1), b = 10.05(1), and c = 12.24(1){\AA}. These compounds were characterized by powder X-ray diffraction, thermogravimetric analysis, magnetic susceptibility, and infrared spectroscopy. The reduced compounds reversibly oxidize to their respective precursor in oxygen at low temperatures.",

author = "Poeppelmeier, {K. R.} and Leonowicz, {M. E.} and Longo, {J. M.}",

year = "1982",

month = aug,

doi = "10.1016/0022-4596(82)90404-2",

language = "English (US)",

volume = "44",

pages = "89--98",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - CaMnO2.5 and Ca2MnO3.5

T2 - New oxygen-defect perovskite-type oxides

AU - Poeppelmeier, K. R.

AU - Leonowicz, M. E.

AU - Longo, J. M.

PY - 1982/8

Y1 - 1982/8

N2 - We found that when the precursors CaMnO3 and Ca2MnO4 are reduced with any one of a variety of inorganic (H2, NH3) or organic (C2H4, C3H6) reducing agents between 300 and 500°C, topotactic reaction occurs to produce the ordered oxygen-defect phases CaMnO2.5 and Ca2MnO3.5, respectively. Orthorhombic cell constants for CaMnO2.5 are a = 5.43(1), b = 10.24(1), and c = 3.74(1) Å, and for Ca2MnO3.5 are a = 5.30(1), b = 10.05(1), and c = 12.24(1)Å. These compounds were characterized by powder X-ray diffraction, thermogravimetric analysis, magnetic susceptibility, and infrared spectroscopy. The reduced compounds reversibly oxidize to their respective precursor in oxygen at low temperatures.

AB - We found that when the precursors CaMnO3 and Ca2MnO4 are reduced with any one of a variety of inorganic (H2, NH3) or organic (C2H4, C3H6) reducing agents between 300 and 500°C, topotactic reaction occurs to produce the ordered oxygen-defect phases CaMnO2.5 and Ca2MnO3.5, respectively. Orthorhombic cell constants for CaMnO2.5 are a = 5.43(1), b = 10.24(1), and c = 3.74(1) Å, and for Ca2MnO3.5 are a = 5.30(1), b = 10.05(1), and c = 12.24(1)Å. These compounds were characterized by powder X-ray diffraction, thermogravimetric analysis, magnetic susceptibility, and infrared spectroscopy. The reduced compounds reversibly oxidize to their respective precursor in oxygen at low temperatures.

UR - http://www.scopus.com/inward/record.url?scp=0020165199&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020165199&partnerID=8YFLogxK

U2 - 10.1016/0022-4596(82)90404-2

DO - 10.1016/0022-4596(82)90404-2

M3 - Article

AN - SCOPUS:0020165199

SN - 0022-4596

VL - 44

SP - 89

EP - 98

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 1

ER -

CaMnO_2.5 and Ca₂MnO_3.5: New oxygen-defect perovskite-type oxides

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this