H in rutile-type compounds: I. Single-crystal neutron and X-ray diffraction study of H in rutile
@article{Swope1995HIR, title={H in rutile-type compounds: I. Single-crystal neutron and X-ray diffraction study of H in rutile}, author={R. Jeffrey Swope and Joseph R. Smyth and Allen C. Larson}, journal={American Mineralogist}, year={1995}, volume={80}, pages={448 - 453} }
Abstract The crystal structure of natural hydrous rutile from a mantle eclogite nodule has been refined from single-crystal neutron diffraction data collected at 24 K. The chemical composition was 95.52 wt% TiO2, 0.74 wt% Fe2O3, 0.68 wt% Al2O3, 1.16 wt% Cr2O3, 1.86 wt% Nb2O5, and 0.04 wt% MnO, with approximately 13000 ppm OH-, as estimated by IR spectroscopy. The position of the H atom was located by examining the negative residuals in the difference Fourier maps. The refined position is near…
30 Citations
H in rutile-type compounds: II. Crystal chemistry of Al substitution in H-bearing stishovite
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The crystal structures of a synthetic H-bearing aluminous stishovite, containing approximately 1.6 wt% A1203, and a pure-silica stishovite have been refined from threedimensional, single-crystal…
H in rutile-type compounds; II, Crystal chemistry of Al substitution in H-bearing stishovite
- Geology
- 1995
The crystal structures of a synthetic H-bearing aluminous stishovite, containing approximately 1.6 wt% A1203, and a pure-silica stishovite have been refined from threedimensional, single-crystal…
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- Physics, Chemistry
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Abstract Synthetic stishovite before and after electron- and γ-ray irradiation has been investigated by singlecrystal electron paramagnetic resonance (EPR) spectroscopy for the first time.…
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- Materials Science
- 2013
Abstract We performed hydration experiments of pure and Nb-, Cr-, and V-doped synthetic dry (H2O < 3 ppm) single rutile crystals. They were equilibrated with pure H2O in hydrothermal experiments at…
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- Materials Science
- 2017
Abstract A new Ti-bearing bridgmanite-like phase with a threefold commensurate superstructure of the ideal MgSiO3-perovskite structure was observed in a [Mg5/6Al1/6][Si1/2Ti1/3Al1/6]O3 crystal…
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- Materials Science
- 2010
Abstract Thin crystals of rutile, brookite, anatase, and cassiterite were irradiated in situ in the transmission electron microscope using 1.0 MeV Kr ions at 50-300 K. Synthetic rutile and natural…
An experimental study of OH solubility in rutile at 500–900 °C, 0.5–2 GPa, and a range of oxygen fugacities
- Materials Science
- 2011
Abstract The solubility of OH in pure synthetic rutile was experimentally constrained at 0.5-2.0 GPa and 500-900 °C, in equilibrium with four oxygen fugacity (ƒO₂) buffering mineral assemblages:…
IR Spectroscopic Characterization of OH Defects in Mineral Phases
- Geology
- 2003
Infrared spectroscopy provides information on structural sites, hydrogen bond lengths, and concentrations of trace amounts of hydrogen in nominally anhydrous minerals. OH defects in olivine are…
Raman spectroscopy of water-rich stishovite and dense high-pressure silica up to 55 GPa
- Geology
- 2017
Abstract Recent studies have shown that mineral end-member phases (δ-AlOOH phase, phase H, and stishovite) with rutile-type or modified rutile-type crystal structures and solid solutions between them…
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