The Missing Stacking Variant 4-MnP4, Realized for the Solid Solution Cr1−xMnxP4(x= 0.3–0.7)

Paschke, Dirk; Wallinda, Jörg; Jeitschko, Wolfgang

doi:10.1006/jssc.1996.0103

Cited by 5 publications

(12 citation statements)

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“…The nearest-neighbor interactions in MnP 4 were earlier described as covalent bonding. 8,9 Based on the octet rule this leads to a d 5 electron configuration for Mn and an oxidation number of +2 (see ref 12 and references cited therein). Physical Properties.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…7 Using a Sn-flux, 8-MnP 4 and ultimately two other polymorphs 2-MnP 4 8 and 6-MnP 4 9 were identified with reaction temperatures ranging between 820 and 1200 K. The stacking variant "4-MnP 4 ", formed by Mn 1−x Cr x P 4 (0.3 < x < 0.7), was also obtained from a Sn-flux at high temperature (948 K). 12 Only one single-phase product of 2-MnP 4 has been obtained so far. 9 In this case, iodine transport in a temperature gradient produced the desired crystal structure as a single phase at the cool end of a tube while the hot end of the tube contained the alternate polymorphs.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Furthermore, the powder diffraction patterns collected on selected and crushed single crystals of the new phase indicated the pattern was different compared to the previously reported MnP 4 modifications. [7][8][9]12 Instead the collected pattern was similar to γ-FeP 4 11 crystallizing in Laue group 2/m with the monoclinic space group C2/c.…”

Section: ■ Introductionmentioning

confidence: 99%

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Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide

et al. 2015

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A new polymorph of MnP4 was prepared by reaction of the elements via chemical vapor transport with iodine as transporting agent. The crystal structure was refined using single-crystal diffraction data (space group Cc, no. 9, a = 5.1049(8) Å, b = 10.540(2) Å, c = 10.875(2) Å, β = 93.80(2)°). The phase is called γ-MnP4 as it is isostructural with γ-FeP4. It is the fourth reported binary polymorph in the MnP4 system, all of which are stacking variants of nets built with manganese and phosphorus atoms. In γ-MnP4, there are two Mn-Mn distances (2.93 and 3.72 Å) arising from a Peierls-like distortion effectively forming Mn2 dumbbells in the structure. Magnetic and electrical conductivity measurements show diamagnetism and a small anisotropic band gap (100-200 meV) with significantly enhanced conductivity along the crystallographic a axis. Calculations of the electronic and vibrational (phonon) structures show the P-P and Mn-P bonds within the nets are mainly responsible for the stability of the phase. The similar bonding motifs of the polymorphs give rise to the existence of numerous dynamically stable variants. The calculated Helmholtz energy shows the polymorph formation to be closely tied to temperature with the 6-MnP4 structure favorable at low temperatures, the 2-MnP4 favorable between approximately 800 and 2000 K, and 8-MnP4 preferred at high temperatures.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide

et al. 2015

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“…The missing stacking variant 4‐MnP 4 could only be prepared in form of a solid solution with chromium: Cr 1− x Mn x P 4 with x having values between 0.3 and 0.7. Again, for the preparation of these samples in a tin flux powders of binary Cr/Mn alloys were used 141…”

Section: The Tin Fluxmentioning

confidence: 99%

The Metal Flux: A Preparative Tool for the Exploration of Intermetallic Compounds

2005

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This review highlights the use and great potential of liquid metals as exotic and powerful solvents (i.e. fluxes) for the synthesis of intermetallic phases. The results presented demonstrate that considerable advances in the discovery of novel and complex phases are achievable utilizing molten metals as solvents. A wide cross-section of examples of flux-grown intermetallic phases and related solids are discussed and a brief history of the origins of flux chemistry is given. The most commonly used metal fluxes are surveyed and where possible, the underlying principal reasons that make the flux reaction work are discussed.

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“…Die fehlende Stapelvariante 4‐MnP 4 konnte nur in Form einer festen chromhaltigen Lösung Cr 1− x Mn x P 4 erhalten werden, wobei x zwischen 0.3 und 0.7 liegt. Auch in diesem Fall wurden bei den Ansätzen in der Zinnflux Pulver der entsprechenden binären Legierungen Cr/Mn eingesetzt 141…”

Section: Zinn Als Flussmittelunclassified

Metallische Schmelzen – Reaktionsmedien zur Präparation intermetallischer Verbindungen

2005

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Ziel dieses Aufsatzes ist es, die Vorzüge von flüssigen Metallen als Lösungsmittel bei der Synthese intermetallischer und ähnlich zusammengesetzter Verbindungen aufzuzeigen. Eine Vielzahl neuer Phasen mit zum Teil ungewöhnlichen Zusammensetzungen wurde in den letzten Jahren auf diese Weise erstmals hergestellt. Nach einem kurzen historischen Überblick werden die vorteilhaften Eigenschaften der eingesetzten Metallschmelzen (Flussmittel, Flux) für die Synthese eines breiten Spektrums von Verbindungen besprochen.

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The Missing Stacking Variant 4-MnP4, Realized for the Solid Solution Cr1−xMnxP4(x= 0.3–0.7)

Cited by 5 publications

References 1 publication

Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide

Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide

The Metal Flux: A Preparative Tool for the Exploration of Intermetallic Compounds

Metallische Schmelzen – Reaktionsmedien zur Präparation intermetallischer Verbindungen

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The Missing Stacking Variant 4-MnP4, Realized for the Solid Solution Cr1−xMnxP4(x= 0.3–0.7)

Cited by 5 publications

References 1 publication

Discovery of γ-MnP4 and the Polymorphism of Manganese Tetraphosphide

Discovery of γ-MnP4 and the Polymorphism of Manganese Tetraphosphide

The Metal Flux: A Preparative Tool for the Exploration of Intermetallic Compounds

Metallische Schmelzen – Reaktionsmedien zur Präparation intermetallischer Verbindungen

Contact Info

Product

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Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide

Discovery of γ-MnP₄ and the Polymorphism of Manganese Tetraphosphide