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Structure Analysis of Natural Wangdaodeite—LiNbO₃-Type FeTiO₃

Tschauner, Oliver and Ma, Chi and Newville, Matthew G. and Lanzirotti, Antonio (2020) Structure Analysis of Natural Wangdaodeite—LiNbO₃-Type FeTiO₃. Minerals, 10 (12). Art. No. 1072. ISSN 2075-163X.

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This paper reports the first structure refinement of natural wangdaodeite, LiNbO₃-type FeTiO₃ from the Ries impact structure. Wangdaodeite occurs together with recrystallized ilmenite clasts in shock melt veins which have experienced peak shock pressures of between 17 and 22 GPa. Comparison of natural and synthetic wangdaodeite points toward a correlation between the distortion of ferrate- and titanate-polyhedra and the c/a ratio of the unit cell. The Raman spectrum of wangdaodeite is calculated based on the refined structure. Comparison to the reported spectrum of the type-material shows that the Raman peak at 738–740 cm⁻¹ is indicative for this phase, whereas other features in type-wangdaodeite are tentatively assigned to disordered ilmenite.

Item Type:Article
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URLURL TypeDescription Materials
Tschauner, Oliver0000-0003-3364-8906
Ma, Chi0000-0002-1828-7033
Newville, Matthew G.0000-0001-6938-1014
Lanzirotti, Antonio0000-0002-7597-5924
Alternate Title:Structure Analysis of Natural Wangdaodeite—LiNbO3-Type FeTiO3
Additional Information:© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( Received: 29 October 2020; Accepted: 23 November 2020; Published: 30 November 2020. The Advanced Photon Source, a DOE Office of Science User Facility is operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. SEM and EPMA measurements were carried out at the Geological and Planetary Science Division Analytical Facility at Caltech, supported in part by NSF grants EAR-0318518, EAR-1322082, and DMR-0080065. O.T. acknowledges the support from DOE Cooperative Agreement #DE-NA0001982. We also thank V. Stähle and D. Stöffler for providing the thin-section ZLN114c which contains type riesite and we thank the Institut für Geowissenschaften, University of Heidelberg, and in particular M. Trieloff for permitting us to examine this section, which is part of their collection. Part of this work was supported by DOE Cooperative Agreement #DE-NA0001982, DOE-contract.DE-FG02-94ER14466, and NSF Grants EAR-1634415, -1128799, -1322082, and DMR-0080065. Author Contributions: Conceptualization, O.T. and C.M.; methodology, O.T., C.M., A.L. and M.G.N.; software, M.G.N.; validation, O.T. and C.M.; formal analysis, O.T. and C.M.; investigation, O.T., C.M. and A.L.; resources, C.M., A.L. and M.G.N.; data curation, O.T. and C.M.; writing—original draft preparation, O.T.; writing—review and editing, O.T. and C.M.; funding acquisition, O.T., A.L. and M.G.N. All authors have read and agreed to the published version of the manuscript. The authors declare no conflict of interest.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-06CH11357
Department of Energy (DOE)DE-NA0001982
Department of Energy (DOE)DE-FG02-94ER14466
Subject Keywords:high-pressure mineral; LiNbO3; FeTiO3; shock-compression
Issue or Number:12
Record Number:CaltechAUTHORS:20201210-140943636
Persistent URL:
Official Citation:Structure Analysis of Natural Wangdaodeite—LiNbO₃-Type FeTiO₃. Minerals 2020, 10, 1072; doi:10.3390/min10121072
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107016
Deposited By: Tony Diaz
Deposited On:10 Dec 2020 22:37
Last Modified:10 Dec 2020 22:37

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