The defect chemistry of LaMnO[sub 3[+-][delta]] 3. The density of (La,A)MnO[sub 3+[delta]] (A = Ca, Sr Ba)

Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1994.1142· OSTI ID:6836853

Van Roosmalen, J A.M.; Cordfunke, E H.P. ^[1]

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1. Netherlands Energy Research Foundation ECN, Petten (Netherlands)

The density of La[sub 1[minus]x]A[sub x]MnO[sub 3+[delta]] was determined for x = 0, 0.15, 0.30 (A = Ca, Sr, Ba) and for x = 0.50 (A = Sr) using a pycnometer, defect chemical considerations, lattice parameters, and chemical analyses. The oxygen excess in LaMnO[sub 3+[delta]] is compensated by both La and Mn vacancies in equal amounts. This is confirmed by density measurements. According to this defect model the density of LaMnO[sub 3+[delta]] is almost independent of [delta] for 0 [<=] [delta] 0.18 and is calculated to be (6.57 [+-] 0.02) G [center dot]cm[sup [minus]3]. The same defect model is applied to calculate the density of La[sub 1[minus]x]A[sub x]MnO[sub 3+[delta]].

• OSTI ID: 6836853
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 110:1; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DENSITY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STOICHIOMETRY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS