12305-97-4

Basic information

• Product Name: iron, compound with praseodymium (2:1)
• Synonyms: Iron, compound with praseodymium (2:1); iron praseodymium
• CAS NO: 12305-97-4
• Molecular Formula: Fe₂Pr
• Molecular Weight: 252.5976
• EINECS: 235-574-3
• Mol File: 12305-97-4.mol

Chemical Properties

• CAS DataBase Reference: iron, compound with praseodymium (2:1)(CAS DataBase Reference)
• NIST Chemistry Reference: iron, compound with praseodymium (2:1)(12305-97-4)
• EPA Substance Registry System: iron, compound with praseodymium (2:1)(12305-97-4)

Safety Data

• Hazardous Substances Data: 12305-97-4(Hazardous Substances Data)

Upstream product

• 7439-89-6 iron 

Relevant articles and documents

Directional solidification and characterization of binary Fe-Pr and Fe-Nd eutectic alloys

In this work, the directional solidification technique was employed in binary Fe-Pr and Fe-Nd eutectic alloys with compositions near to their respective eutectic points. Solidifying the Fe-Pr and Fe-Nd hypereutectic alloys in a vertical Bridgman crystal growth unit, we were able to obtain the two eutectic morphologies, one globular and other feathered, normally observed in as-cast samples, in a coarser form and sequentially displayed along the length of the samples. The transition temperatures nearby to the eutectic points were also determined using a Calvet type calorimeter. The phases comprising the globular and feathered morphologies were determined as being, respectively, Fe17R2 and Fe2R (R = Pr or Nd), for both systems. These experiments also showed very clearly the peritectic formation of the Fe2R phases from the Fe17R2 and the liquids. Thermomagnetic measurements gave the Curie temperature as being 44°C for the Fe2Pr phase and 252°C for the Fe2Nd phase.

Structure and magnetostriction of Ho 1 -xPrx Fe 1.9 alloys

Polycrystalline Ho1-xPrxFe1.9 (0≤x≤1) cubic Laves alloys were synthesized by arc-melting and subsequent annealing under high stress. Their structure, magnetic properties and magnetostriction are investigated using X-ray diffraction, vibrating sample magnetometer and standard strain gauge technique, respectively. It was found that Ho1-xPrxFe1.9 single cubic Laves phase cannot be obtained when x>0.2 by a traditional vacuum annealing method. In contrast, the cubic Laves phase can be stabilized over the whole studies range in the samples annealed under high stress. The saturation magnetization for Ho1-xPrxFe1.9 decreases with the increase of x and reaches a minimum at x=0.4, then increases with further increase of x, which indicates the antiparallel magnetic moment alignment between Ho and Pr sublattice. The magnetostriction of Ho1-xPrx Fe1.9 does not linearly increase with increasing x, but presents a minimum at x=0.4.

A tale of two metals: New cerium iron borocarbide intermetallics grown from rare-earth/transition metal eutectic fluxes

R33Fe14-xAlx+yB25-yC 34 (R = La or Ce; x ≥ 0.9; y ≥ 0.2) and R33Fe 13-xAlxB18C34 (R = Ce or Pr; x a = 14.617(1) A, Z = 2, R1 = 0.0155 for Ce33Fe13.1Al1.1B24.8C34, and a = 14.246(8) A, Z = 2, R1 = 0.0142 for Ce 33Fe13B18C34). Their structures can be described as body-centered cubic arrays of large Fe13 or Fe 14 clusters which are capped by borocarbide chains and surrounded by rare earth cations. The magnetic behavior of the cerium-containing analogs is complicated by the possibility of two valence states for cerium and possible presence of magnetic moments on the iron sites. Temperature-dependent magnetic susceptibility measurements and Moessbauer data show that the boron-centered Fe14 clusters in Ce33Fe14-xAl x+yB25-yC34 are not magnetic. X-ray photoelectron spectroscopy data indicate that the cerium is trivalent at room temperature, but the temperature dependence of the resistivity and the magnetic susceptibility data suggest Ce3+/4+ valence fluctuation beginning at 120 K. Bond length analysis and XPS studies of Ce33Fe 13B18C34 indicate the cerium in this phase is tetravalent, and the observed magnetic ordering at TC = 180 K is due to magnetic moments on the Fe13 clusters.

Magnetic and magnetostrictive properties in high-pressure synthesized Dy1-xPrxFe1.9(0 ≤ x ≤ 1) cubic Laves alloys

Polycrystalline alloys Dy1-xPrxFe1.9 (0 ≤ x ≤ 1) were synthesized by arc-melting and subsequent high-pressure annealing. Their crystal structure, magnetic properties and magnetostriction have been investigated. X-ray diffraction results show that the system exhibits almost single cubic Laves phase with MgCu2-type structure over the whole range. The lattice parameter of the cubic Laves phase increases linearly with increasing Pr concentration, while the Curie temperature goes the opposite way. The saturation magnetization for Dy1-xPrxFe 1.9 decreases with the increase of x and reaches a minimum at x = 0.4, then it continues to increase with further increase of x, which reflects the antiparallel magnetic moment of Dy and Pr. The magnetostriction λ - λ⊥ first increases and then decreases within the range of 0.0 ≤ x ≤ 0.4, and increases monotonically with further increasing x.

Composition anisotropy compensation and magnetostriction in Pr(Fe 1-xCox)1.9 (0≤x≤0.5) cubic Laves alloys

Polycrystalline magnetostrictive alloys Pr(Fe1-xCo x)1.9 (0≤x≤0.5) with cubic Laves phase were synthesized by high-pressure annealing. Measurements of Curie temperature, easy magnetic direction (EMD), and magnetostriction were made on these alloys. The EMD of the alloys rotates continuously from 〈111〉 for x=0.0 to 〈110〉 for x=0.3 and then shows a tendency to 〈111〉 with further increasing x. Two magnetostriction peaks at low fields are observed around x=0.2 and x=0.4 due to the lower anisotropy of these two alloys, which is consistent with the variation of EMD. This work demonstrates that the composition anisotropy compensation can be realized in Pr(Fe 1-xCox)1.9 system.

Structure, thermal stability and magnetostrictive properties of PrFex (1.5 ≤ x ≤ 3.0) alloys

Polycrystalline alloys PrFex (x = 1.5, x = 1.8, x = 1.9, x = 2.0, x = 3.0) have been prepared by arc-melting and subsequent high-pressure synthesis method. Their structure, thermal stability, easy magnetization direction and magnetostriction are investigated. Almost single Laves phase (MgCu2-type) is found in sample with x = 1.9. Samples with x = 2.0, x = 3.0 consist of PrFe1.9 phase with MgCu2-type cubic structure and α-Fe phase. The Curie temperature (238 °C) and the decomposed temperature (408 °C) of PrFe1.9 alloys are derived from M-T curves. The easy magnetization direction of PrFe1.9 Laves phase lies along [1 1 1] axis at room temperature which is verified by Mo?ssbauer spectrum. Furthermore, PrFe1.9 alloy shows a large magnetostriction λ|| - λ⊥ = 1081 × 10-6 at a magnetic field of 13 kOe.

High-pressure synthesis of giant magnetostrictive PrxTb 1-xFe1.9alloys

Prx Tb1-x Fe1.9 (0≤x≤1) magnetostrictive alloys with cubic Laves phase have been synthesized by a high-pressure synthesis method. Crystal structure, magnetic properties, magnetocrystalline anisotropy, and the magnetostriction of Prx Tb1-x Fe1.9 (0≤x≤1) alloys are investigated. Composition anisotropy compensation is realized in Pr0.9 Tb0.1 Fe1.9 alloy, which shows low magnetocrystalline anisotropy and a large magnetostriction value (λ∥ - λ⊥ =1497 ppm) at 13 kOe at room temperature. These characters suggest that Pr0.9 Tb0.1 Fe1.9 alloy may be a promising candidate for magnetostriction application.

Magnetic properties and thermal stability of PrFe2 compound

It is thought that Pr ions make a large contribution to the magnetocrystalline anisotropy and magnetostriction of Pr-Fe intermetallic compounds. It was estimated that the magnetostriction of PrFe2 is larger than that of TbFe2 at 0 K. In this paper, polycrystalline PrFe2 was prepared by a high-pressure synthesis method. Its structure, magnetic properties and thermal stability were investigated. For a multi-phase specimen, the magnetostriction constant, λ∥-λ⊥, is 1030×10-6, comparable to that of Terfenol-D and might be larger if the single phase PrFe2 could be obtained. The PrFe2 compound becomes unstable and decomposes into Pr and Fe above 630 K, so it cannot be obtained by high temperature method under normal atmosphere.