CoReO4, a new rutile-type derivative with ordering of two cations

Baur, W. H.; Joswig, W.; Pieper, G.; Kassner, Dethard

doi:10.1016/0022-4596(92)90307-h

Cited by 18 publications

(15 citation statements)

References 7 publications

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“…Interatomic metal-oxygen distances Co-O and Re-O suppose rather the assignment of Co +3 and Re +5 than Co +2 and Re +6 [6]. NiReO 4 , as reported in [5], adopts also a rutile-derivated structure, but no structural parameters were provided.…”

Section: Synthesis and Sample Characterisationmentioning

confidence: 94%

“…between averaged bond lengths in the equatorial plane and to apical oxygens, respectively, has the lowest value for NiRe 2 [6] adopts a rutile-like orthorhombic structure with an ordering of Co and Re on two distinct crystallographic sites and without Re-Re-bonds. Interatomic metal-oxygen distances Co-O and Re-O suppose rather the assignment of Co +3 and Re +5 than Co +2 and Re +6 [6].…”

Section: Synthesis and Sample Characterisationmentioning

confidence: 99%

“…The study of M x Re 1Àx O 2 for M-3d transition metals is limited to only a few works [5][6][7][8]. The best known compounds crystallize either in the rutile-structure with a random distribution of cations or rutile-like structures with or without cation ordering.…”

Section: Introductionmentioning

confidence: 99%

“…MnReO 4 (Mn 0.5 Re 0.5 O 2 ) [5,7] and ZnReO 4 (Zn 0.5 Re 0.5 O 2 ) [5] adopt a wolframite-type structure without any metallic bond. Sc 3+ demonstrates similarity with heavy rare earth elements in Re-containing compounds forming Sc 6 ReO 12 with fluorite-like structure [9], and with 3d-elements forming ScRe 2 O 6 with a new rutile-derivated monoclinic structure containing Re 2 O 10 -units with Re-Re bonds [8]. Compounds MReO 4 for MQFe, Co, Ni were obtained for the first time by Sleight [5] using HPHT.…”

Section: Introductionmentioning

confidence: 99%

“…FeReO 4 crystallizes in the tetragonal rutile-structure with a random cation occupation, whereas an increasing Fe-content in the compound causes an ordering of the cations resulting in the formation of a superstructure: a tri-a-PbO 2 -type was proposed for Fe 2 ReO 6 . For CoReO 4 a new rutile-derivated type with an ordering of two cations was postulated [6], the structure of NiReO 4 is not solved yet [5]. Despite the lack of physical properties investigations of rutile-like Re-and 3d-containing complex oxides some of them seem to demonstrate metallic type of conductivity due to the delocalization of d electrons of Re-cations on Re-O-Re-O and Re-Re-Re linkages.…”

Section: Introductionmentioning

confidence: 99%

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Metallic Re–Re bond formation in different MRe2O6 (MFe, Co, Ni) rutile-like polymorphs: The role of temperature in high-pressure synthesis

Mikhailova¹,

Ehrenberg²,

Oswald³

et al. 2009

Journal of Solid State Chemistry

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Keywords: 3d-metal rhenium oxide MRe 2 O 6 Rutile-like structure Polymorphism High-pressure synthesis Re-Re bond Magnetism XPS spectra a b s t r a c t Different polymorphs of MRe 2 O 6 (MQFe, Co, Ni) with rutile-like structures were prepared using highpressure high-temperature synthesis. For syntheses temperatures higher than $1573 K, tetragonal rutile-type structures (P4 2 /mnm) with a statistical distribution of M-and Re-atoms on the metal position in the structure were observed for all three compounds, whereas rutile-like structures with orthorhombic or monoclinic symmetry, partially ordered M-and Re-ions on different sites and metallic Re-Re-bonds within Re 2 O 10 -pairs were found for CoRe 2 O 6 and NiRe 2 O 6 at a synthesis temperature of 1473 K. According to the XPS measurements, a mixture of Re +4 /Re +6 and M 2+ /M 3+ is present in both structural modifications of CoRe 2 O 6 and NiRe 2 O 6 . The low-temperature forms contain more Re +4 and M 3+ than the high-temperature forms. Tetragonal and monoclinic modifications of NiRe 2 O 6 order with a ferromagnetic component at $24 K, whereas tetragonal and orthorhombic CoRe 2 O 6 show two magnetic transitions: below $17.5 and 27 K for the tetragonal and below 18 and 67 K for the orthorhombic phase. Tetragonal FeRe 2 O 6 is antiferromagnetic below 123 K.

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Section: Synthesis and Sample Characterisationmentioning

confidence: 94%

Section: Synthesis and Sample Characterisationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metallic Re–Re bond formation in different MRe2O6 (MFe, Co, Ni) rutile-like polymorphs: The role of temperature in high-pressure synthesis

Mikhailova¹,

Ehrenberg²,

Oswald³

et al. 2009

Journal of Solid State Chemistry

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Zur Kristallchemie der Oxorhenate

Müller‐Buschbaum¹

2007

Zeitschrift anorg allge chemie

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Das Review behandelt die Kristallchemie der Oxorhenate. Im Gegensatz zur Kristallchemie der kürzlich diskutierten Oxorhodate tritt Rhenium in vielfältiger Koordination auf. Zu nennen sind quadratisch planare Polygone, trigonale Bipyramiden, Tetraeder und Oktaeder. Ausgehend von den Oxiden ReO2, Re2O7, Re1,16O3, Re3O10 and ReO3 wird gezeigt, daß Oxorhenate zueinander isolierte Tetraeder, Oktaeder, Re2O10‐ und Re2O9‐Baugruppen aufweisen. Die Polyeder von Sauerstoff um Rhenium treten isoliert zueinander auf oder bilden eindimensionale Ketten, zweidimensionale Netze und dreidimensionale Gerüststrukturen. Rhenium adaptiert die Kristallstrukturen der Perowskite, des Fluorits, des Pyrochlors, Rutils und der Stapelvarianten der Perowskite. Spezielle Eigenschaften weisen die Quecksilber‐Oxorhenate (HgReO4, Hg2ReO5, Hg5Re2O10) mit – Hg+‐Hg+ – Gruppen und die Selten Erdmetall‐Oxorhenate (Ln2ReO5, Ln3Re2O9, Ln5Re2O12) mit deutlichen Re‐Re – Wechselwirkungen auf. PbRe2O8 und BiReO4 sind bemerkenswert mit Blick auf einseitig offene Polyeder, die durch lone pair – Aktivität am Pb2+ und Bi3+ hervorgerufen werden. Die Lagen der lone pair (e2−–Punktladung) werden durch Berechnungen des Madelunganteils der Gitterenergie ermittelt.

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