ChemInform Abstract: Stabilization of the Oxidation State M(IV) in the Ni5MB2O10 Type (M: V4+, Mn4+).

Bluhm, K.; Mueller‐Buschbaum, Hk.

doi:10.1002/chin.199018034

Cited by 2 publications

(5 citation statements)

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“…The general chemical formula is Me +3 Mе +2 2 BO 5 . Metal ions can be present as one ion with a different valence (homometallic) , and various ions (heterometallic) . Metal ions (bivalent ‐ Mg, Ni, Zn, Co, Fe, trivalent ‐ Al, V, Cr, Mn, Fe, Ga, Co, tetravalent ‐ Mn, Sn, Ge, Zr, Ti, and even pentavalent ‐ Sb, Nb) are located in the center of the oxygen octahedral coordination with common edges.…”

Section: Crystal Structurementioning

confidence: 99%

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Ludwigites: From natural mineral to modern solid solutions

Софронова

Назаренко

2017

Crystal Research and Technology

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Ludwigites is a type of oxyborates compounds with BO 3 groups, which have low-dimensional elements: stairs, zigzag walls, tapes. Such structural features influence on the physical properties of the compounds and cause charge ordering, the existence of two magnetic subsystems, ordered at different temperatures in the perpendicular direction, the quasi-one-dimensional magnetism, spin-glass state. In this survey, we have summarized all known experimental and theoretical studies and analyzed the proposed by the authors mechanisms of phase transitions in the ludwigite structure oxyborates.

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Section: Crystal Structurementioning

confidence: 99%

“…However, in ludwigites, manganese can be in the tetravalent state, e.g. in Ni 5 Mn(BO 5 ) 2 . And probably in Co 1.7 Mn 1.3 BO 5 compound, cobalt and manganese ions are present in different valence states, in different positions, which makes long‐range magnetic order occurrence impossible in the system.…”

Section: Heterometallic Ludwigitesmentioning

confidence: 99%

Ludwigites: From natural mineral to modern solid solutions

Софронова

Назаренко

2017

Crystal Research and Technology

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“…The parameters are the same as described above. It is seen that the critical fluctuations are significantly reduced but survive, in particular in χ 4 /χ 2 , when resonance decays are included [46].…”

Section: Non-critical Sources Of Fluctuationsmentioning

confidence: 98%

“…that the number of protons among the baryons is given by a binomial distribution, can be corrected [49,50,51]. [46]. The red squares are obtained from particlization over a fluid dynamical hypersurface with parameters tuned to reproduce the experimental data for the cumulants [44].…”

Section: Non-critical Sources Of Fluctuationsmentioning

confidence: 99%

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The QCD Critical Point and Related Observables

Nahrgang

2016

Nuclear Physics A

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The search for the critical point of QCD in heavy-ion collision experiments has sparked enormous interest with the completion of phase I of the RHIC beam energy scan. Here, I review the basics of the thermodynamics of the QCD phase transition and its implications for experimental multiplicity fluctuations in heavy-ion collisions. Several sources of noncritical fluctuations impact the observables and need to be understood in addition to the critical phenomena. Recent progress has been made in dynamical modeling of critical fluctuations, which ultimately is indispensable to understand potential signals of the QCD critical point in heavy-ion collision. Keywords: The QCD phase diagram and heavy-ion collisionsOne of the most fascinating opportunities of heavy-ion collisions is the investigation of the phases of strongly interacting matter at finite temperatures and densities. At ultrarelativistic beam energies the interaction of the initial nuclei excites the vacuum and high energies are deposited in the reaction zone, creating a very hot medium of vanishing net-baryon density. At lower beam energies the incoming baryon currents are stopped and the medium is less hot but more dense than at highest beam energies. In these extreme regimes it is expected that a new state of matter, the quark-gluon plasma of colored partonic degrees of freedom is created. The success of models like statistical hadronization [1] and of fluid dynamical simulations [2,3,4] in comparison to a variety of experimental data, indicates that the medium thermalizes locally and a connection to QCD thermodynamics is possible.Experimental efforts started at lower beam energies, from Bevalac and AGS to the CERN-SPS, mounting up to highest beam energies at RHIC and the LHC. Recent interest has focused on the possibility of scanning the QCD phase diagram by varying the beam energy in the lower energy region. The recent beam energy scan phase I has been completed at RHIC where ample data has been taken and analyzed [5,6,7,8]. Currently, the beam energy and system size scan with the NA61 experiment at the CERN-SPS has started and future programs include the beam energy scan phase II at RHIC and upcoming facilities like the CBM [9] experiment at FAIR, GSI Helmholtz Center and NICA [10] at JINR in Dubna. The main goal of these endeavors is the investigation of the QCD phase transition and the discovery of a conjectured critical point at finite net-baryon density.From lattice QCD calculations at zero baryo-chemical potential it is known that the phase change between a partonic and a hadronic medium is an analytic crossover [11] in the temperature range of T c =

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ChemInform Abstract: Stabilization of the Oxidation State M(IV) in the Ni5MB2O10 Type (M: V4+, Mn4+).

Abstract: Single crystals of the hitherto unknown title compounds are grown from a B2O3 flux after reaction of V2O5 (MnO2 or Mn2O3) with NiO in a large excess of B2O3 at 1200‐1300 °C. Both compounds crystallize orthorhombic in the Ni5TiB2O10 structural type (Pbam, Z=2).

Cited by 2 publications

References 1 publication

Ludwigites: From natural mineral to modern solid solutions

Ludwigites: From natural mineral to modern solid solutions

The QCD Critical Point and Related Observables

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