DC pole | Wartość | Język |
dc.contributor.author | Krzątała, Arkadiusz | - |
dc.contributor.author | Panikorovskii, Taras L. | - |
dc.contributor.author | Galuskina, Irina | - |
dc.contributor.author | Galuskin, Evgeny | - |
dc.date.accessioned | 2018-09-14T11:53:38Z | - |
dc.date.available | 2018-09-14T11:53:38Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Minerals, Vol. 8, iss. 8 (2018), Art. no. 340 | pl_PL |
dc.identifier.issn | 2075-163X | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/6201 | - |
dc.description.abstract | A natural barioferrite, BaFe3+ 12O19, from a larnite–schorlomite–gehlenite vein of paralava within gehlenite hornfels of the Hatrurim Complex at Har Parsa, Negev Desert, Israel, was investigated by Raman spectroscopy, electron probe microanalysis, and single-crystal X-ray analyses acquired over the temperature range of 100–400 K. The crystals are up to 0.3 mm × 0.1 mm in size and form intergrowths with hematite, magnesioferrite, khesinite, and harmunite. The empirical formula of the barioferrite investigated is as follows: (Ba0.85 Ca0.12 Sr0.03)∑1 (Fe3+ 10.72Al0.46 Ti4+ 0.41Mg0.15 Cu2+ 0.09Ca0.08 Zn0.04 Mn2+ 0.03Si0.01)∑11.99 O19. The strongest bands in the Raman spectrum are as follows: 712, 682, 617, 515, 406, and 328 cm−1. The structure of natural barioferrite (P63 /mmc, a = 5.8901(2) Å, c = 23.1235(6) Å, V = 694.75(4) Å3, Z = 2) is identical with the structure of synthetic barium ferrite and can be described as an interstratification of two fundamental blocks: spinel-like S-modules with a cubic stacking sequence and R-modules that have hexagonal stacking. The displacement ellipsoids of the trigonal bipyramidal site show elongation along the [001] direction during heating. As a function of temperature, the mean apical Fe–O bond lengths increase, whereas the equatorial bond lengths decrease, which indicates dynamic disorder at the Fe2 site. | pl_PL |
dc.description.sponsorship | NCN | pl_PL |
dc.language.iso | en | pl_PL |
dc.relation | 2016/21/N/ST10/00463 | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | Barioferrite | pl_PL |
dc.subject | Crystal structure | pl_PL |
dc.subject | Hatrurim complex | pl_PL |
dc.subject | Raman | pl_PL |
dc.subject | Single-crystal investigation | pl_PL |
dc.title | Dynamic disorder of Fe3+ ions in the crystal structure of natural barioferrite | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.3390/min8080340 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
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