Low-temperature synthesis of freudenbergite-type titanate bronzes from metal halides, crystal growth from molybdate flux, and crystal structure determination of Na sub(1.84)Zn sub(0.92)Ti sub(7.08)O sub(16)

Low-temperature synthesis of freudenbergite-type titanate bronzes from metal halides, crystal growth from molybdate flux, and crystal structure determination of Na sub(1.84)Zn sub(0.92)Ti sub(7.08)O sub(16)

A new precipitation method to synthesize freudenbergite-type phases from metal halides has been developed, and titanate bronzes of the general formula Na sub(x)M sub(y)Ti sub(8-y)O sub(16) with M = Fe, Zn were obtained as micro-crystalline powders (Fe: orange-yellow, Zn: colorless). The crystal stru...

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Veröffentlicht in:Journal of alloys and compounds 2015-09, Vol.644, p.783-787
Hauptverfasser: Bruhn, Gerd, Beutel, Sebastian, Pfaff, Gerhard, Albert, Barbara
Format: Artikel
Sprache:eng
Schlagworte:
Bronzes
CHEMICAL ANALYSIS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
DIFFUSION
FABRICATION
Flux
FLUXES
HALIDES
Iron
Molybdates
SINGLE CRYSTALS
Synthesis
Titanates
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creator Bruhn, Gerd
Beutel, Sebastian
Pfaff, Gerhard
Albert, Barbara
description A new precipitation method to synthesize freudenbergite-type phases from metal halides has been developed, and titanate bronzes of the general formula Na sub(x)M sub(y)Ti sub(8-y)O sub(16) with M = Fe, Zn were obtained as micro-crystalline powders (Fe: orange-yellow, Zn: colorless). The crystal structures were refined based on synchrotron X-ray data using the Rietveld method. Single crystals of the new compound Na sub(1.848(8))Zn sub(0.924(3))T i sub(7.076(3))O sub(16) were grown from molybdate flux, and its crystal structure was determined (s.g. C2/m, No. 12, a = 1230.2(2) pm, b = 381.94(4) pm, c = 650.2(2) pm, and beta = 107.09(2)[degrees]). It is isostructural to the Fe-containing freudenbergite-type phase. Absorption spectra from diffuse reflection measurements are shown.
doi_str_mv 10.1016/j.jallcom.2015.05.076
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subjects Bronzes
CHEMICAL ANALYSIS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
DIFFUSION
FABRICATION
Flux
FLUXES
HALIDES
Iron
Molybdates
SINGLE CRYSTALS
Synthesis
Titanates
title Low-temperature synthesis of freudenbergite-type titanate bronzes from metal halides, crystal growth from molybdate flux, and crystal structure determination of Na sub(1.84)Zn sub(0.92)Ti sub(7.08)O sub(16)
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