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Title
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Exsolution of SrO during the topochemical conversion of to the Oxyhydride
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Author
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Abstract
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| Reaction of the n = 1 Ruddlesden-Popper oxide LaSr3CoRuO8 with CaH2 yields the oxyhydride phase LaSr3CoRuO4H4 via a topochemical anion exchange. Close inspection of the X-ray and neutron powder diffraction data in combination with HAADF-STEM images reveals that the nanoparticles of SrO are exsolved from the system during the reaction, with the change in cation stoichiometry accommodated by the inclusion of n > 1 (Co/Ru)(n)On+1H2n "perovskite" layers into the Ruddlesden-Popper stacking sequence. This novel pseudotopochemical process offers a new route for the formation of n > 1 Ruddlesden-Popper structured materials. Magnetization data are consistent with a LaSr3Co+Ru2+O4H4 (Co+, d(8), S = 1; Ru2+, d(6), S = 0) oxidation/spin state combination. Neutron diffraction and mu+SR data show no evidence for long-range magnetic order down to 2 K, suggesting the diamagnetic Ru2+ centers impede the Co-Co magnetic-exchange interactions. |
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Language
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English
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Source (journal)
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Inorganic chemistry / American Chemical Society. - Easton, Pa
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Publication
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Easton, Pa
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2019
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ISSN
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0020-1669
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DOI
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10.1021/ACS.INORGCHEM.9B02552
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Volume/pages
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58
:21
(2019)
, p. 14863-14870
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ISI
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000494894400062
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Pubmed ID
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31638780
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Full text (Publisher's DOI)
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Full text (open access)
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