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Article

Structure Analysis of Natural Wangdaodeite—LiNbO3-Type FeTiO3

1
Department of Geoscience, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
2
Division of Geology and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
3
GeoSoilEnviroCARS, Argonne National Laboratory, University of Chicago at the Advanced Photon Source, Argonne, IL 60367, USA
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(12), 1072; https://doi.org/10.3390/min10121072
Received: 29 October 2020 / Revised: 21 November 2020 / Accepted: 23 November 2020 / Published: 30 November 2020
(This article belongs to the Special Issue Minerals under Extreme Conditions)
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. View Full-Text
Keywords: high-pressure mineral; LiNbO3; FeTiO3; shock-compression high-pressure mineral; LiNbO3; FeTiO3; shock-compression
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MDPI and ACS Style

Tschauner, O.; Ma, C.; Newville, M.G.; Lanzirotti, A. Structure Analysis of Natural Wangdaodeite—LiNbO3-Type FeTiO3. Minerals 2020, 10, 1072. https://doi.org/10.3390/min10121072

AMA Style

Tschauner O, Ma C, Newville MG, Lanzirotti A. Structure Analysis of Natural Wangdaodeite—LiNbO3-Type FeTiO3. Minerals. 2020; 10(12):1072. https://doi.org/10.3390/min10121072

Chicago/Turabian Style

Tschauner, Oliver, Chi Ma, Matthew G. Newville, and Antonio Lanzirotti. 2020. "Structure Analysis of Natural Wangdaodeite—LiNbO3-Type FeTiO3" Minerals 10, no. 12: 1072. https://doi.org/10.3390/min10121072

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