12044-52-9

Upstream product

• 7440-06-4 platinum 
• 7440-38-2 arsenic 
• 7439-96-5 manganese 
• 10025-99-7 potassium tetrachloroplatinate(II) 
• 12044-25-6 sodium arsenide 

Relevant academic research and scientific papers

Crystal Structure, Magnetism, and Electronic Properties of a Rare-Earth-Free Ferromagnet: MnPt5As

The design and synthesis of targeted functional materials have been long-term goals for materials scientists. Although a universal design strategy is difficult to generate for all types of materials, it is still helpful for individual families of materials to have such design rules. Herein, we incorporated several significant chemical and physical factors relevant to magnetism, such as structure-type, atomic distance, and spin-orbit coupling, and have thereby successfully synthesized a new rare-earth-free ferromagnet, MnPt5As, for the first time. MnPt5As can be prepared by high-temperature pellet methods. According to the X-ray diffraction results, MnPt5As crystallizes in a tetragonal unit cell with the space group P4/mmm (Pearson symbol tP7). Magnetic measurements on MnPt5As confirm ferromagnetism in this phase with a Curie temperature of ～301 K and a saturated moment of 3.5 μB per formula unit. Evaluation by applying the Stoner criterion also indicates that MnPt5As is susceptible to ferromagnetism. Electronic structure calculations using the WIEN2k program with local spin density approximation imply that the spontaneous magnetization of this phase arises primarily from the hybridization of the d orbitals on both Mn and Pt atoms. The theoretical assessments are consistent with the experimental results. Moreover, spin-orbit coupling effects heavily influence the magnetic moments in MnPt5As. MnPt5As is the first ferromagnetic material in the MgPt5As structure-type. The discovery of MnPt5As offers a platform to study the interplay between magnetism and structure.

Coexistence of superconductivity and charge density wave in SrPt 2As2

SrPt2As2 is a novel arsenide superconductor, which crystallizes in the CaBe2Ge2-type structure as a different polymorphic form of the ThCr2Si2-type structure. SrPt2As2 exhibits a charge-density-wave (CDW) ordering at about 470K and enters into a superconducting state at Tc = 5:2K. The coexistence of superconductivity and CDW refers to Peierls instability with a moderately strong electron-phonon interaction. Thus SrPt2As 2 can be viewed as a nonmagnetic analog of iron-based superconductors, such as doped BaFe2As2, in which superconductivity emerges in close proximity to spin-density-wave ordering.

Transition Metal Pnictide Synthesis: Self Propagating Reactions Involving Sodium Arsenide, Antimonide and Bismuthide

Initiation of the reaction between Na3E (E=As, Sb, Bi) and anhydrous metal halides at 25 to 550 deg C produces metal arsenides MxAsy (M = Y, La, Ti, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Pt, Cu and Zn) and antimonides MxSby (M = Ti, V, Nb, Ta, Cr, Fe, Co, Ni, Pt, Cu and Zn) via an exothermic selfpropagating reaction.The metal arsenides were characterized by X-ray powder diffraction, SEM/EDAX, microanalysis and FT-IR. - Keywords: Metal Arsenide, Sodium Arsenide, Metal Antimonide, Sodium Antimonide, Solid State Methathesis

FAR-INFRARED REFLECTION SPECTRA, TO- AND LO-PHONON FREQUENCIES, COUPLED AND DECOUPLED PLASMON-PHONON MODES, DIELECTRIC CONSTANTS, AND EFFECTIVE DYNAMICAL CHARGES OF MANGANESE, IRON, AND PLATINUM GROUP PYRITE TYPE COMPOUNDS.

A study is made of the far-infrared reflection spectra, the phonon frequencies, and the optical and dielectric constants of the pyrites RuS//2, RuSe//2, RuTe//2, OsS//2, OsSe//2, OsTe//2, PtP//2, PtAs//2, and PtSb//2.