Berlin 2012 – scientific programme

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KR: Fachgruppe Kristallographie

KR 8: Poster – 100 years since the Laue experiment: Topical aspects of diffraction and scattering (Joint Session KR, BP, DF, GP, MA, MI, MM; related SYXD)

KR 8.4: Poster

Wednesday, March 28, 2012, 15:00–17:30, Poster E

Inter-layer disorder in sodium cobaltate — •David Jonathan Pryce Morris¹, Alan Tennant^1,2, Klaus Seiffert^1,3, Esther Dudzik¹, Dharmalingam Prabhakaran⁴, Jon Goff⁵, Michel Roger⁶, and Jon Wright⁷ — ¹Helmholtz-Zentrum Berlin, Germany — ²TU-Berlin, Germany — ³Kiel University, Germany — ⁴Oxford University, UK — ⁵Royal Holloway, University of London, UK — ⁶CEA-Saclay, France — ⁷ESRF, France

Sodium Cobaltate is a layered material which has been studied as a potential battery material, has shown good thermoelectric properties and becomes superconducting when hydrated. The physical properties are dependent on sodium content and the ordering of sodium ions. Sodium ordering in NaxCoO2 has previously been observed to have long-range order. Using x-ray diffraction we have observed a phase with long-range in-plane order and inter-layer disorder. Here we will present the data giving a possible structural interpretation.