High Pressure X-ray Diffraction Study of MgMn2O4 Tetragonal Spinel

Lorenzo Malavasi; Cristina Tealdi; Monica Amboage; M. Cristina Mozzati; Giorgio Flor

doi:10.1016/j.nimb.2005.06.042

High Pressure X-ray Diffraction Study of MgMn2O4 Tetragonal Spinel

Materials Science 2009-11-10 v1

Authors: Lorenzo Malavasi , Cristina Tealdi , Monica Amboage , M. Cristina Mozzati , Giorgio Flor

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Abstract

The phase stability of the MgMn2O4 spinel has been studied by means of high-pressure X-ray diffraction for pressures up to 30 GPa. Two samples with different inversion degrees have been considered. Both spinels undergo a phase transition towards an orthorhombic structure (CaMn2O4-type). For the more inverted sample the transition pressure is at least 1 GPa lower with respect to that of the less inverted spinel. Also the volume contraction, relative compressibility and density trends are different for the two samples. These variations have been explained according to differences in the cation distribution. and electronic properties of the samples.

Keywords

high-pressure phase transitions phase transitions crystal growth and phase transitions

Cite

@article{arxiv.cond-mat/0408559,
  title  = {High Pressure X-ray Diffraction Study of MgMn2O4 Tetragonal Spinel},
  author = {Lorenzo Malavasi and Cristina Tealdi and Monica Amboage and M. Cristina Mozzati and Giorgio Flor},
  journal= {arXiv preprint arXiv:cond-mat/0408559},
  year   = {2009}
}

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12 pages; 4 Figures presented at the SRMS-4

High Pressure X-ray Diffraction Study of MgMn2O4 Tetragonal Spinel

Abstract

Keywords

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