Structural variations and cation distributions in Mn3−xCoxO4 (0≤x≤3) dense ceramics using neutron diffraction data

Bordeneuve, Hélène; Tenailleau, Christophe; Guillemet‐Fritsch, Sophie; Smith, Robert W.; Suard, Emmanuelle; Rousset, A.

doi:10.1016/j.solidstatesciences.2009.11.018

Cited by 102 publications

(117 citation statements)

References 36 publications

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“…According to our previous studies performed on ceramics of similar compositions (Bordeneuve, Rousset, Tenailleau, Guillemet-Fritsch, 2010b) . However, the reduction processes are not fully completed at the highest temperature of TGA measurements (T = 1300 °C) and it is not observed for CoMn 2 O 4 nanopowders, in accordance with previous results obtained on ceramics (Bordeneuve et al, 2010a). The dark Co 3-x Mn x O 4 (x = 1, 1.5, 2) nanoparticles display absorbance of light in the UV and early visible spectra, as shown in Figure 6.…”

Section: Resultssupporting

confidence: 89%

“…A scheme of agglomerate and a dark colloidal suspension of Co 2 MnO 4 are shown in insets of Figure 1 to illustrate the synthetic products. (Bordeneuve et al, 2010a). At room temperature, it is known that Mn 3-x Co x O 4 undergoes a symmetry transition at x ~ 1.7 where a peak splitting is observed for some peaks of the cubic phase as the symmetry is lowered (Aukrust & Muan, 1964).…”

Section: Resultsmentioning

confidence: 99%

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A Simple Preparation Process of Pure Mn3-Xcoxo4 (X= 1, 1.5 and 2) Desert Rose-Like Nanoparticles and Their Optical Properties

Salek¹,

Guillemet‐Fritsch²,

Dufour³

et al. 2012

IJC

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Monodisperse CoMn 2 O 4 , Co 1.5 Mn 1.5 O 4 and Co 2 MnO 4 nanoparticles were prepared by a rapid and low cost method. The organic and complex dispersing agent free synthesis of stable colloidal suspensions containing pure nanoparticles of spinel oxides was optimized at low temperature (T<100 °C). The key point of the synthesis is the fast introduction of the precursor solution into a much larger volume of alkaline solution buffered with LiOH. XRD, SEM-FEG and HRTEM performed on desert rose-like nanoparticles showed that nanoparticles are crystallized and of uniform shape/size distributions. Thermogravimetric analyses give an insight into the sample composition of nanopowders in relation with semiconductor ceramic counterparts. The UV-Vis absorption spectra of these pure spinel oxide nanoparticles in solution are discussed.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

A Simple Preparation Process of Pure Mn3-Xcoxo4 (X= 1, 1.5 and 2) Desert Rose-Like Nanoparticles and Their Optical Properties

Salek¹,

Guillemet‐Fritsch²,

Dufour³

et al. 2012

IJC

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“…Although neutron powder diffraction data were only recorded to demonstrate a neutron diffraction inert cryoprotectant, the collected data of hydrogenated L-(-)-ephedrine hemihydrate could be solved and refined directly without an X-ray model. However, most applications of neutron powder diffraction are carried out to follow changes in the crystal structure [78], e.g., when atoms and molecules are absorbed [79,80] or the crystal structure changes due to strain [81,82]. Neutron powder data retain the advantage of the strong scattering by particular nuclei, especially deuterium and of course does not suffer from the sporadic availability of the very large single crystals needed for single crystal neutron work.…”

Section: Neutron Diffractionmentioning

confidence: 99%

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

Fucke

Steed

2010

Water

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A review. Diffraction methods are a powerful tool to investigate the crystal structure of organic compounds in general and their hydrates in particular. The laboratory standard technique of single crystal X-ray diffraction gives information about the molecular conformation, packing and hydrogen bonding in the crystal structure, while powder X-ray diffraction on bulk material can trace hydration/dehydration processes and phase transitions under non-ambient conditions. Neutron diffraction is a valuable complementary technique to X-ray diffraction and gives highly accurate hydrogen atom positions due to the interaction of the radiation with the atomic nuclei.Although not yet often applied to organic hydrates, neutron single crystal and neutron powder diffraction give precise structural data on hydrogen bonding networks which will help explain why hydrates form in the first place.

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“…Consequently, the real structure is tetragonal rather than cubic. [14,15]. For a spinel structure rich in Mn 3+ , net distortion of these octahedral sites could lead to a unit cell transformation from cubic to tetragonal if the amount of Mn 3+ in these sites is high enough [16].…”

Section: Resultsmentioning

confidence: 99%

Formation, crystal growth and colour appearance of Mimetic Tianmu glaze

Chiang

Greer

Liu

et al. 2016

Ceramics International

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Abstract:Mimetic Tianmu glaze has been synthesized and analysed by using X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy and transmission electron microscopy. It was found that the main body of the glaze was amorphous aluminium silicate with many embedded polycrystalline spherical particles of metal oxides containing manganese, cobalt, vanadium, bismuth and tungsten. Two dimensional spinel dendrites crystals of manganese, cobalt and aluminium oxide formed on the surface of the glaze. The formation mechanism of the microstructures in the Tianmu glaze is proposed. The colour appearance of the glaze has also been discussed.It has been found that the crystal thickness dependant light interference could be an important factor for the appearance of rainbow-like colour in the glaze layer.

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Structural variations and cation distributions in Mn3−xCoxO4 (0≤x≤3) dense ceramics using neutron diffraction data

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author -deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID: 3829

Cited by 102 publications

References 36 publications

A Simple Preparation Process of Pure Mn3-Xcoxo4 (X= 1, 1.5 and 2) Desert Rose-Like Nanoparticles and Their Optical Properties

A Simple Preparation Process of Pure Mn3-Xcoxo4 (X= 1, 1.5 and 2) Desert Rose-Like Nanoparticles and Their Optical Properties

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

Formation, crystal growth and colour appearance of Mimetic Tianmu glaze

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