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Gershenkop, A. Sh.; Герасимова, Л. Г.; Khokhulya, M. S.; Zhdanova, N M; Okhrimenko, R. F.

doi:10.1023/a:1017501522564

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…It is possible to verify that muscovite presents a relatively narrow particle size distribution with a mass average diameter – d(0.5) – of 34.5 μm; the values of d(0.1) and d(0.9), being 13.3 and 71.1 μm, respectively. This is an appropriate size range to be used in the synthesis of pearlescent pigments [12].…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterisation of pigments based on mica coated with rare earth oxides

Santos

França

Ogasawara

2011

Coloration Technology

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Muscovite from a Brazilian natural source was beneficiated using knife mills and an ultrasound treatment. It was possible to achieve mica with a particle size of below 100 and above 45 lm and a thickness of between 0.5 and 1 lm. This product could be used for the synthesis of intensely coloured pearlescent pigments based on muscovite covered with rare earth oxides (CeO 2 , PrO 2 and Ce 0.95 Pr 0.05 O 2 ). Pigments were prepared by hydrolysis and characterised by X-ray diffraction, thermal analyses (thermogravimetric ⁄ differential thermal) and scanning electron microscopy (MeV). The colour of the resulting pigments was analysed using the CIELab method, including a pearlescence index, and it showed the following colours: mica-CeO 2 , yellow; mica-PrO 2 , black; mica-Ce 0.95 Pr 0.05 O 2 , orange.

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Section: Resultsmentioning

confidence: 99%

Preparation and characterisation of pigments based on mica coated with rare earth oxides

Santos

França

Ogasawara

2011

Coloration Technology

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Layered Natural Minerals as Carriers of Active Components for Functional Materials

Nikolaev

Герасимова

Shchukina

et al. 2019

Inorg. Mater. Appl. Res.

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Surface Crystal Chemistry of Phyllosilicates Using X-Ray Photoelectron Spectroscopy: A Review

Elmi

Guggenheim

Gieré

2016

Clays and clay miner.

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The characterization of freshly cleaved mica surfaces for surface structure and chemical composition was briefly reviewed and focused on surface crystal chemistry using X-ray photoelectron spectroscopy (XPS) and other surface-sensitive techniques. This paper considers micas, which are useful as a first approximation for the behavior of many clay surfaces. Emphasis was given to phyllosilicate XPS binding energies (''chemical shift''), which were described and used to obtain oxidation state, layer charge, and chemical bonding information from the chemical shifts of different peaks. The chemical shift of the Si2p binding-energy to lower values can result from a negative charge increase because of Si4+ replacement by Al3+ and/or Fe3+. The apparent interlayer coordination number reduction from twelve to eight at muscovite and tetraferriphlogopite (001) surfaces was indicated by the XPS measured K2p binding-energy and is consistent with bond relaxation. Although chemical shifts are valuable to distinguish chemical bonding and oxidation state, chemical shifts usually cannot distinguish between different Al coordination environments where Al is in both tetrahedral and octahedral sites.

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Untitled

Cited by 4 publications

References 5 publications

Preparation and characterisation of pigments based on mica coated with rare earth oxides

Preparation and characterisation of pigments based on mica coated with rare earth oxides

Layered Natural Minerals as Carriers of Active Components for Functional Materials

Surface Crystal Chemistry of Phyllosilicates Using X-Ray Photoelectron Spectroscopy: A Review

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