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Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate

Identifieur interne : 000F62 ( Main/Curation ); précédent : 000F61; suivant : 000F63

Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate

Auteurs : K. Benkhouja [Maroc] ; M. Zahir [Maroc] ; A. Sadel [Maroc] ; A. Handizi ; A. Boukhari ; E. M. Holt ; J. Aride ; M. Drillon [France]

Source :

Materials research bulletin [ 0025-5408 ] ; 1995.

RBID : Pascal:95-0094548

Descripteurs français

Pascal (Inist)
- Etude expérimentale, XRD, Structure cristalline, Composé quaternaire, Nickel phosphate, Manganèse phosphate, Nickel Diphosphate, Manganèse Diphosphate, Solution solide, Composition chimique, Etude phase, Susceptibilité magnétique, 6166F, 7530C, Ni2-xMnxP2O7, Mn Ni O P.

English descriptors

KwdEn :
- Chemical composition, Crystal structure, Experimental study, Magnetic susceptibility, Manganese Pyrophosphates, Manganese phosphates, Nickel Pyrophosphates, Nickel phosphates, Phase studies, Quaternary compounds, Solid solutions, XRD.

Abstract

A study of the crystal chemistry of the Ni_2-xMn_xP₂O₇ systems in powder form, 0 ≤ x ≤ 2, has revealed the existence of three solid solutions. When x < 0.10, the solution is isostructural with low temperature form, α-Ni₂P₂O₇. When 0.10 ≤ x ≤ 0.40, the structure of the solid solution is similar to that of σ-Ni₂P₂O₇. When 0.60 ≤ x ≤ 2, a form similar to β-Ni₂P₂O₇ (or Mn₂P₂O₇) is seen. The single crystal structure of material corresponding to x=0.816 has been determined in monoclinic space group Cm, a = 6.557(3), b = 8.738(5), c = 4.498(3), β = 103.24(1)°, V = 240.6(2) Å³, Z = 2, R/R_w=3.8/5.3% and shows a structural deformation of the parent lattice. The system shows antiferromagnetic interactions at low temperature

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Le document en format XML

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<author><name sortKey="Holt, E M" sort="Holt, E M" uniqKey="Holt E" first="E. M." last="Holt">E. M. Holt</name>
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<author><name sortKey="Aride, J" sort="Aride, J" uniqKey="Aride J" first="J." last="Aride">J. Aride</name>
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<author><name sortKey="Drillon, M" sort="Drillon, M" uniqKey="Drillon M" first="M." last="Drillon">M. Drillon</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical composition</term>
<term>Crystal structure</term>
<term>Experimental study</term>
<term>Magnetic susceptibility</term>
<term>Manganese Pyrophosphates</term>
<term>Manganese phosphates</term>
<term>Nickel Pyrophosphates</term>
<term>Nickel phosphates</term>
<term>Phase studies</term>
<term>Quaternary compounds</term>
<term>Solid solutions</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>XRD</term>
<term>Structure cristalline</term>
<term>Composé quaternaire</term>
<term>Nickel phosphate</term>
<term>Manganèse phosphate</term>
<term>Nickel Diphosphate</term>
<term>Manganèse Diphosphate</term>
<term>Solution solide</term>
<term>Composition chimique</term>
<term>Etude phase</term>
<term>Susceptibilité magnétique</term>
<term>6166F</term>
<term>7530C</term>
<term>Ni2-xMnxP2O7</term>
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<front><div type="abstract" xml:lang="en">A study of the crystal chemistry of the Ni<sub>2-x</sub>
Mn<sub>x</sub>
P<sub>2</sub>
O<sub>7</sub>
 systems in powder form, 0 ≤ x ≤ 2, has revealed the existence of three solid solutions. When x < 0.10, the solution is isostructural with low temperature form, α-Ni<sub>2</sub>
P<sub>2</sub>
O<sub>7</sub>
. When 0.10 ≤ x ≤ 0.40, the structure of the solid solution is similar to that of σ-Ni<sub>2</sub>
P<sub>2</sub>
O<sub>7</sub>
. When 0.60 ≤ x ≤ 2, a form similar to β-Ni<sub>2</sub>
P<sub>2</sub>
O<sub>7</sub>
 (or Mn<sub>2</sub>
P<sub>2</sub>
O<sub>7</sub>
) is seen. The single crystal structure of material corresponding to x=0.816 has been determined in monoclinic space group Cm, a = 6.557(3), b = 8.738(5), c = 4.498(3), β = 103.24(1)°, V = 240.6(2) Å<sup>3</sup>
, Z = 2, R/R<sub>w</sub>
=3.8/5.3% and shows a structural deformation of the parent lattice. The system shows antiferromagnetic interactions at low temperature</div>
</front>
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Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate

Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri