Crystal and magnetic structure and cation distribution of Mn2−xV1+xO4 spinels (x=0, 1/3 and 1)

Pannunzio-Miner, Elisa V.; Paoli, J.M. De; Sánchez, R.D.; Carbonio, R. E.

doi:10.1016/j.materresbull.2009.01.022

Cited by 7 publications

(29 citation statements)

References 36 publications

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“…This includes the system Mn 2-x V 1 þ x O 4 that was studied by Pannunzio-Miner et al [1], and for which the end members are formed by Mn 2 þ 2 V 4 þ O 4 and Mn 2 þ V 3 þ 2 O 4 . Other compounds with lower valent vanadium are Mn 2 þ V 4 þ O 3 (ilmenite type structure) [2] and compounds of the solid solution series Mn x V 1-x O with the rock salt structure [3].…”

Section: Introductionmentioning

confidence: 99%

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Clemens¹,

Haberkorn²,

Springborg³

et al. 2012

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 99%

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Clemens¹,

Haberkorn²,

Springborg³

et al. 2012

Journal of Solid State Chemistry

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“…It has been known that MnV 2 O 4 has a normal cation distribution in which V is located mainly on the octahedral site . The recent study by Pannunzio–Miner et al . on structural information of MnV 2 O 4 reported that the MnV 2 O 4 has the crystallographic formula of (Mn

_{0.75}^{2 +}

_{0.25}^{3 +}

) T (Mn

_{0.25}^{2 +}

_{1.75}^{3 +}

) O O 4 .…”

Section: Resultsmentioning

confidence: 88%

“…According to XRD analysis, it was refined in the cubic Fd3m space group (typical of the spinel structure) with a lattice parameter of 8.5334 Å (n V / (n Mn + n V ) = 0.60), which is in agreement with 8.532 Å 15 , but slightly less than a recently reported value 8.5771 Å . 16 This seems to be attributed to nonstoichiometric nature of the (MnV 2 O 4 ) s.s. . Stoichiometry of this phase is close to a typical spinel type compounds (AB 2 O 4 where A is divalent cation and B is trivalent cation) when it is in equilibrium with V 2 O 3 .…”

Section: Resultsmentioning

confidence: 99%

“…The only intermediate phase observed in this phase diagram is (MnV 2 O 4 ) s.s. . According to XRD analysis, it was refined in the cubic

Fd \overset{true¯}{3} m

space group (typical of the spinel structure) with a lattice parameter of 8.5334 Å ( n V /( n Mn + n V ) = 0.60), which is in agreement with 8.532 Å , but slightly less than a recently reported value 8.5771 Å . This seems to be attributed to nonstoichiometric nature of the (MnV 2 O 4 ) s.s. .…”

Section: Resultsmentioning

confidence: 99%

“…It has been known that MnV 2 O 4 has a normal cation distribution in which V is located mainly on the octahedral site. 19 The recent study by Pannunzio-Miner et al 16…”

Section: (3) Phase Diagram Of the Mn-v-o System At 1500°c Under Diffementioning

confidence: 97%

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Phase Equilibria in the Mn–V–O System Near MnO–V₂O₃ Isopleth

et al. 2012

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Phase equilibria in the Mn–V–O system near MnO–V2O3 isopleth has been investigated in the temperature range from 1200°C to 1600°C and in the range of oxygen partial pressure from ∼10−6 to ∼10−13 atm. High‐temperature equilibration, quenching and electron probe microanalysis were employed to obtain equilibrium compositions of liquid and several solid solutions. XRD analysis was also employed to confirm the stable phases. The phases which have been observed are; liquid oxide, (MnO)s.s., (V2O3)s.s., and (MnV2O4)s.s.. The (MnV2O4)s.s. phase was confirmed to be the only intermediate phase near the MnO–V2O3 isopleth under the conditions in the present study. It was found that sub‐solidus phase equilibria are considerably affected by the oxygen partial pressure. From the effect of oxygen partial pressure on the sub–solidus phase equilibria, the structures (Mn2+, V2+)T(Mn2+, Mn3+, Mn4+, V3+, Va)2−x OO4, (V3+, Mn3+, V4+)2O3+y and (Mn2+, Mn3+, V2+)1−zO are proposed for MnV2O4, V2O3, and MnO solid solutions, respectively.

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Synthesis and Characterization of the New Mixed Valent Compound Mn₅VO₈

Clemens

Haberkorn

Kohlmann

et al. 2012

Zeitschrift anorg allge chemie

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This work describes the synthesis and characterization of the new compound Mn 5 VO 8 . This phase is the only known ternary mixed valent compound in the system MnO-Mn 2 O 3 -V 2 O 5 and crystallizes in a so far unknown crystal structure, which leads to coordination for the Jahn-Teller cation Mn 3+ in distorted octahedra (elongated and compressed, respectively). The material can be prepared by solid state reaction at 900°C in a monoclinic [a = 19.5605(10) Å, b = 6.2184(3) Å, c = 5.4276(3) Å, β = 100.078(4)°, C2/m, Z = 4] as well

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Crystal and magnetic structure and cation distribution of Mn2−xV1+xO4 spinels (x=0, 1/3 and 1)

Cited by 7 publications

References 36 publications

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Phase Equilibria in the Mn–V–O System Near MnO–V₂O₃ Isopleth

Synthesis and Characterization of the New Mixed Valent Compound Mn₅VO₈

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Crystal and magnetic structure and cation distribution of Mn2−xV1+xO4 spinels (x=0, 1/3 and 1)

Cited by 7 publications

References 36 publications

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals Na Mn4.5−/2(VO4)3 (0≤x≤1)

Phase Equilibria in the Mn–V–O System Near MnO–V2O3 Isopleth

Synthesis and Characterization of the New Mixed Valent Compound Mn5VO8

Contact Info

Product

Resources

About

Phase Equilibria in the Mn–V–O System Near MnO–V₂O₃ Isopleth

Synthesis and Characterization of the New Mixed Valent Compound Mn₅VO₈