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(a) Normalized lattice parameters variation for vs. . (b) Cell volume (full stars) and parameter (full circles) variation vs. . (c) Mn–O bond lengths for at room temperature vs . In the inset: variation of the paramter vs. .
Panel (a): Cell volume and parameter variation versus pressure at 80 K. Panel (b): normalized lattice parameters versus pressure at 80 K.
(a) XRD patterns vs. at 80 K. Rietveld refined patterns at GPa and 80 K with a single orthorhombic phase model (b) and two tetragonal phases model (c). Empty circles represent the experimental patterns, black line calculated ones while horizontal black line shows the difference. for refinement of panel A is 18.8% and for panel B refinement is 5.1%.
Mn–O bond lengths at 80 K vs. up to . In the inset: variation of the parameter at 80 K.
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