2019
DOI: 10.1039/c9dt01789e
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Crystal structure and stacking faults in the layered honeycomb, delafossite-type materials Ag3LiIr2O6and Ag3LiRu2O6

Abstract: were synthesized from α-Li 2 IrO 3 and Li 2 RuO 3 respectively by ion exchange in an AgNO 3 melt. The crystal structures of the title compounds were solved from high resolution laboratory X-ray powder diffraction (XRPD) patterns and from pair distribution function (PDF) analysis using synchrotron X-ray powder diffraction data. In both crystal structures edge sharing LiO 6/3and (Ir/Ru)O 6/3 -octahedra form honeycomb like layers that are stacked in a staggered fashion. Silver cations, situated in-between the lay… Show more

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Cited by 52 publications
(64 citation statements)
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“…, a recent structural analysis of the material agrees with our solution [27]. The asymmetric broadening (Warren line shape) of the peaks between 18 and 24 • in the inset of Fig.…”
supporting
confidence: 89%
“…, a recent structural analysis of the material agrees with our solution [27]. The asymmetric broadening (Warren line shape) of the peaks between 18 and 24 • in the inset of Fig.…”
supporting
confidence: 89%
“…Knowing that only two low-energy CEF transitions are expected for the Ce 3+ ion (which is confirmed by the firstprinciples calculation), the origin of this additional line is unclear. It can possibly originate from a minority of Ce ions in a different surrounding, for instance in the vicinity of crystal defects such as stacking faults that are typical for the layered delafossite structure [56][57][58]. Similar additional CEF lines have been previously observed, for instance, in the isostructural NaYbO 2 [25], NaYbS 2 [19], NaYbSe 2 [28], and in the Ce pyrochlore Ce 2 Zr 2 O 7 [59].…”
Section: Inelastic Neutron Scatteringsupporting
confidence: 68%
“…Honeycomb layered oxides generally can be envisaged to adopt the following compositions of ordered s t r u c t u r e s : A + (A + 3/2 L 3+ 1/6 D 6+ 1/3 O 2 ) , where L can be Zn, Mn, Fe, Co, Cu,Ni, Cr, Mg ; D can be Bi, Te, Sb, Ta, Ir, Nb, W, Sn, Ru, Mo, Os ; A and A * can be alkali atoms (such as Li, Cu, K, Rb, Cs, Ag and Na with A = A * ), transition metal atoms, for instance Cu or noble metal atoms (e.g., Ag, Au, Pd, etc.) [1][2][3][4][5][8][9][10][11][17][18][19][20][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] .…”
Section: An Idealised Approach Of Geometry and Topology To The Diffusmentioning
confidence: 99%