Abstract
Lanthanum chromate (LaCrO4) was synthesized as a low temperature ( < 700°C) intermediate to perovskite-type, lanthanum chromite (LaCrO3). The lattice parameters, atom positions and bond lengths determined from X-ray powder diffraction show that LaCrO4 forms a monazite-type crystal structure. Lanthanum chromate forms a solid solution with Ca, having a solubility between 10 and 20 at %. Thermal analysis shows that at ambient oxygen pressure, LaCrO4 transforms to LaCrO3 at a temperature near 700°C. It also indicates that (La,Ca)CrO4 initially transforms to LaCrO3 and CaCrO4 with the subsequent formation of a (La,Ca)CrO3 solid solution. Evidence of Ca segregation to the surface of (La,Ca) CrO3 particles is given by Auger electron spectroscopy and scanning electron microscopy. © 1996 Chapman & Hall.
Recommended Citation
J. D. Carter et al., "Structure and Phase Transformation of Lanthanum Chromate," Journal of Materials Science, vol. 31, no. 2, pp. 551 - 557, Springer, Jan 1996.
The definitive version is available at https://doi.org/10.1007/BF01139176
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0022-2461
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Springer, All rights reserved.
Publication Date
01 Jan 1996
