Article (Scientific journals)
Cationic Ordering, Solid Solution Domain, and Diffuse Reflectance in Fe2WO6 Polymorphs
Caubergh, Stéphane; Matsubara, Nami; Damay, Françoise et al.
2021In The Journal of Physical Chemistry C, 125 (46), p. 25907-25916
Peer reviewed
 

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Keywords :
Cationic Ordering; Solid Solution Domain; Diffuse Reflectance; Fe2WO6 Polymorphs
Abstract :
[en] Single phases of the α, β, and γ polymorphs of the Fe2WO6 iron tungsten oxide were obtained through an aqueous solution route based on the combustion and heat treatment of a spray-dried precursor powder. Syntheses with Fe/W ratios ≠ 2 identified a domain of solid solutions consistent with a Fe2–2xW1+x□xO6 scenario (x up to ∼0.025) for the defect chemistry in the temperature range around 850 °C. The crystallographic characterizations revealed a random cationic distribution in an α-PbO2-type cell for the low-temperature polymorph (α) and pointed to a reconstructive mechanism for the formation of polymorph β. A comparison of diffuse reflectance spectra confirmed the visual observation of minor color differences between the polymorphs by revealing small shifts of the absorption threshold; the Kubelka–Munk function and Tauc plots were used for comparison of the polymorphs and discussion of the results with respect to relevant literature.
Disciplines :
Chemistry
Author, co-author :
Caubergh, Stéphane ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Matsubara, Nami
Damay, Françoise
Fauth, François
Khalyavin, Dmitry D.
Manuel, Pascal
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Poelman, Dirk
Martin, Christine
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Language :
English
Title :
Cationic Ordering, Solid Solution Domain, and Diffuse Reflectance in Fe2WO6 Polymorphs
Publication date :
11 November 2021
Journal title :
The Journal of Physical Chemistry C
ISSN :
1932-7447
Publisher :
ACS
Volume :
125
Issue :
46
Pages :
25907-25916
Peer reviewed :
Peer reviewed
Available on ORBi :
since 11 January 2022

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