Fig. 2: The crystal structure, bond length, and bond angle comparison between different La4Ni3O10.
From: Absence of superconductivity and density-wave transition in ambient-pressure tetragonal La4Ni3O10
a–c The connection between the NiO6 octahedron for monoclinic phase at ambient pressure (P21/a-AP), tetragonal phase at 19.5 GPa (I4/mmm–HP) and tetragonal phase at ambient pressure (I4/mmm-AP), respectively. d The atom labels of Ni atoms and O atoms. The O5 site only exists in the monoclinic phase, which becomes indistinguishable from O2 in the tetragonal phases. e The bond length and bond angle list between Ni atoms and O atoms. f The powder XRD pattern for tetragonal La4Ni3O10 under the pressure range from ambient pressure to 27.7 GPa. g An enlarged view for (f) with 2θ between 10 − 12 degree. a–d The blue and red circles represent the atoms of Ni and O, respectively.
