Observation optique d'un changement de phase du fluosilicate de manganèse hexahydraté

Tsujikawa, Ikuji; Couture, L.

doi:10.1051/jphysrad:01955001605043001

Cited by 28 publications

(4 citation statements)

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“…Here the powder resonance of both protons and fluorines narrows at about 225 K corresponding to V=8.3 kcal/mole. Optical measurements show a structural transition with about 10 K hysteresis just at this temperature [15]. However, the NMR narrowing is gradual and shows no hysteresis and we do not think that it is connected with the structural transition.…”

Section: Mnsif * 6h2mentioning

confidence: 66%

Motion in Fluosilicates Studied with Nuclear Magnetic Resonance

Skjæveland

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1974

Phys. Scr.

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Motional narrowing of H1 and F19 NMR lines in the fluosilicates of Mn, Fe, Co, Ni, Cu and Zn has been studied. Narrowing due to SiF6 2- complex reorientation occurs at about 225 K, 180 K, 200 K, 150 K, 120 K and 150 K, respectively, and rapid Me(H2O)6 2+ reorientation occurs at 225 K, 220 K, 340 K, 375 K, 350 K and 340 K respectively. This variation is correlated with the variation in density of these nearly isomorphic crystals. At nitrogen temperatures the lattices are static and no effect of any Jahn-Teller motion in CuSiF6·6H2O could be seen.

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Section: Mnsif * 6h2mentioning

confidence: 66%

Motion in Fluosilicates Studied with Nuclear Magnetic Resonance

Skjæveland

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1974

Phys. Scr.

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“…[1,2]). Optical and crystallographic studies ( [3,4]) showed the occurrence of the phase transformation P3ml --+ P21/C in Fe, Mn, Mg-Fls at 230 K, 230 K, 300 K respectively.…”

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confidence: 99%

Phase transformation and slow relaxation in fluosilicates : Mössbauer study

1977

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“…A phase transition occurs near 230°K in MnSiF6.6H20 (Tsujikawa & Couture, 1955) and near 250°K in CoSiF6.6H20 (Ray, 1964;Majumdar & Datta, 1965). While studying these transitions we became interested in the room-temperature structures of this series of salts and learned that they are remarkably diverse in spite of the close isomorphism in the sense of similar axial ratios.…”

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confidence: 99%