Structure of La2NiO4.18

Apurva Mehta, Peter J. Heaney

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


The published structure of La2NiO4+y has unusually short (1.94 ) Ni-O bond lengths. We reexamined the structure of La2NiO4.18 using monochromatic synchrotron x-ray radiation. Rietveld refinement of the structure in space group Bbcm yielded Fourier synthesis (Fobs) maps that suggest a modified structural model for La2NiO4.18. The refined structure contains chemically more reasonable interatomic distances (e.g., shortest Ni-O distance of 2.00 ). A comparison of this structure with that of the superconductor La2CuO4+y reveals disparities in the conduction planes of the two materials that may explain differences in electrical behavior.

Original languageEnglish (US)
Pages (from-to)563-571
Number of pages9
JournalPhysical Review B
Issue number1
StatePublished - 1994

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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