12039-33-7Relevant academic research and scientific papers
R5Pn3-type phases of the heavier trivalent rare-earth-metal pnictides (Pn = Sb, Bi): New phase transitions for Er 5Sb3 and Tm5Sb3
Gupta, Shalabh,Leon-Escamilla, E. Alejandro,Wang, Fei,Miller, Gordon J.,Corbett, John D.
, p. 4362 - 4371 (2009)
The syntheses and distributions of binary R5Pn3 phases among the hexagonal Mn5Si3 (M), and the very similar orthorhombic β-Yb5Sb3 [Y) and Y 5Bi3 (YB) structure types h
Synthesis growth and investigation of the physical-chemical properties of single crystals of TmSb, TmTe and their solid solutions TmSb1-xTex
Abdusalyamova, M. N.,Chuiko, A. G.,Golubkov, A. Y.,Popov, S. I.,Parfenova, L. S.,et al.
, p. 107 - 110 (1994)
A complete series of TmSb1-xTex single crystals has been prepared in order to enable a systematic investigation of the valence change of Tm between nearly +3 for semimetallic TmSb and +2 for semiconducting TmTe. A discontinous semiconductor-metal transition is observed at x=0.8-0.9.
Syntheses, structures, and theoretical studies of new ternary antimonides β-RECoSb3 (RE = La-Nd, Sm)
Cai, Wei-Zhao,Wu, Li-Ming,Li, Long-Hua,Chen, Ling
, p. 230 - 237 (2009)
Five new intermetallic ternary cobalt antimonides β-RECoSb3 have been prepared by solid state reactions and characterized by single-crystal X-ray diffraction. The title compounds crystallize in β-RENiSb 3-type structure, Pbcm (No.57)
Synthesis and Transport Properties of the Family of Zintl Phases Ca3RESb3(RE = La-Nd, Sm, Gd-Tm, Lu): Exploring the Roles of Crystallographic Disorder and Core 4f Electrons for Enhancing Thermoelectric Performance
Ogunbunmi, Michael O.,Baranets, Sviatoslav,Bobev, Svilen
, p. 9382 - 9392 (2021/12/13)
Zintl phases with complex crystal structures have been studied as promising candidate materials for thermoelectric (TE) applications. Here, we report the syntheses of the family of rare-earth metal Zintl phases with the general formula Ca4-xRExSb3 (x ≈ 1; RE = La-Nd, Sm, Gd-Tm, Lu). The structural elucidation is based on refinements of single-crystal X-ray diffraction data for 12 unique chemical compositions. The cubic structure is confirmed as belonging to the anti-Th3P4 structure type (space group I4ˉ 3d, no. 220, Z = 4), where the Ca and RE atoms share the same atomic site with ca. 75 and 25% occupancies, respectively. Such crystallographic disordering of divalent Ca and trivalent RE atoms in the structure provides a pathway to intricate bonding. The latter, together with the presence of heavy elements such as Sb and the lanthanides, are expected to enhance the scattering probability of phonons, thereby leading to low thermal conductivity κ comparable to that of the ordered RE4Sb3. The drive of the hypothetical parent compound Ca4Sb3 to be stabilized by alloying with rare-earth metals can be understood following the Zintl-Klemm concept, as the resultant formula may be rationalized as (Ca2+)3RE3+(Sb3-)3, indicating the realization of closed-shell electronic configurations for all elements. This notion is confirmed by electronic structure calculations, which reveal narrow bandgaps Eg = 0.77 and 0.53 eV for Ca3LaSb3 and Ca3LuSb3, respectively. In addition, the incorporation of RE atoms into the structure drives the phase into a state of a degenerate semiconductor with dominant hole charge carriers.
Synthesis, structure, magnetic and transport properties of LnFeSb 3 (Ln = Pr, Nd, Sm, Gd, and Tb) - Tuning of anisotropic long-range magnetic order as a function of Ln
Phelan, W. Adam,Nguyen, Giang V.,Karki, Amar B.,Young, David P.,Chan, Julia Y.
, p. 6403 - 6409 (2010/09/06)
Single crystals of LnFeSb3 (Ln = Pr, Nd, Sm, Gd, and Tb) have been grown from excess Sb flux. The crystal structure consists of ∞2[FeSb2] octahedra separated by layers of Ln atoms and nearly square planar nets of ∞ 2[Sb2]. These compounds are metallic and display anisotropic magnetic properties. Long-range antiferromagnetic order is observed in the Sm, Gd, and Tb samples when the magnetic field is applied along the crystallographic a-axis. Evidence of magnetic ordering in all the samples is observed for the field applied parallel to the layers. The magnetic properties are well-described by considering only the magnetic interactions between the Ln 4f moments, with no contribution from the Fe sublattice. Herein, we report the crystal growth, structure, magnetization, transport, and chemical stabilities of the title compounds. The Royal Society of Chemistry.
Pressure-induced phase transitions in lanthanide monoantimonides with a NaCl-type structure
Shirotani, Ichimin,Hayashi, Junichi,Yamanashi, Keigo,Ishimatsu, Naoki,Shimomura, Osamu,Kikegawa, Takumi
, p. 1 - 4 (2008/10/08)
By use of synchrotron radiation the powder x-ray diffraction of LnSb (Ln=lanthanide) with a NaCl-type structure has systematically been studied up to 40 GPa at room temperature. First-order phase transitions with the crystallographic change occur for LnSb at high pressures. The structure of the high-pressure phases of LnSb is classified into three groups. The lighter LnSb (Ln=La, Ce, Pr, and Nd) have the tetragonal structure (distorted CsCl-type) at high pressures. The high-pressure form of the middle LnSb (Ln=Sm, Gd, and Tb) is unknown. The heavier LnSb (Ln=Dy, Ho, Er, Tm, and Lu) show the typical NaCl-CsCl (B1-B2) transition at high pressures though the same transition is not observed in the heavier LnP and LnAs. The transition pressures of LnSb increase with decreasing lattice constant in the NaCl-type structure and do not depend on the structure of their high-pressure phases. The high-pressure structural behavior of LnSb is discussed.
