Substitution-induced structure evolution and Zn2+/Ga3+ ordering in “114” oxides MAZn2Ga2O7 (M = Ca2+, Sr2+; A = Sr2+, Ba2+)

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dc.contributor.authorJiang, PFen_AU
dc.contributor.authorHuang, QZen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorTao, FQen_AU
dc.contributor.authorZhou, LJen_AU
dc.contributor.authorGao, WLen_AU
dc.contributor.authorCong, RHen_AU
dc.contributor.authorYang, Ten_AU
dc.date.accessioned2021-06-28T00:55:00Zen_AU
dc.date.available2021-06-28T00:55:00Zen_AU
dc.date.issued2018-06-08en_AU
dc.date.statistics2021-06-16en_AU
dc.description.abstractThe “114” oxides LnBa(Co/Fe)4O7+δ represent a new family of materials that exhibits intriguing physical properties, including geometrically frustrated magnetism, oxygen storage, and magnetoelectric couplings. Various chemical substitutions have been conducted to modify their crystal and magnetic structures as well as physical properties. However, the principles beneath the substitution-induced structural evolution and charge/cationic ordering have not yet been understood. Thus, in this contribution, two complete solid solutions of MAZn2Ga2O7 (M = Ca2+, Sr2+; A = Sr2+, Ba2+) were designed, synthesized, and characterized by Rietveld refinements based on high-resolution X-ray diffraction (XRD) and neutron diffraction (ND) data. The structure symmetry of MAZn2Ga2O7 is determined by the cationic size mismatch between M and A cations that can be defined by the tolerance factor t, i.e., symmetry transitions from P63mc (t > 0.87) to P31c (0.87 > t > 0.75) and to Pna21 (t < 0.75) were observed for MAZn2Ga2O7, associated with the rotation of T1O4 tetrahedra in the triangular layers. The Zn2+/Ga3+ ordering at T sites is also a consequence of the increase or decrease of the average sizes of M and A cations. A small concentration of interstitial oxygen ions can be obtained in Sr2Zn2–xGa2+xO7+x/2 (x = 0.1, 0.2); however, no oxygen ionic conduction was observed at high temperatures, indicating the migration ability of the interstitial oxygen was very limited. © 2018 American Chemical Societyen_AU
dc.identifier.citationJiang, P., Huang, Q., Avdeev, M., Tao, F., Zhou, L., Gao, W., Cong, R., & Yang, T. (2018). Substitution-induced structure evolution and Zn2+/Ga3+ ordering in “114” oxides MAZn2Ga2O7 (M = Ca2+, Sr2+; A = Sr2+, Ba2+). Inorganic chemistry, 57(13), 7770-7779. doi:10.1021/acs.inorgchem.8b00845en_AU
dc.identifier.issn1520-510Xen_AU
dc.identifier.issue13en_AU
dc.identifier.journaltitleInorganic chemistryen_AU
dc.identifier.pagination7770-7779en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.inorgchem.8b00845en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10908en_AU
dc.identifier.volume57en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectMultigroup theoryen_AU
dc.subjectOxygenen_AU
dc.subjectCationsen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectPhysical propertiesen_AU
dc.subjectChemical propertiesen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.titleSubstitution-induced structure evolution and Zn2+/Ga3+ ordering in “114” oxides MAZn2Ga2O7 (M = Ca2+, Sr2+; A = Sr2+, Ba2+)en_AU
dc.typeJournal Articleen_AU
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