The phase diagram of the PrSb system

Abdusalyamova, M. N.; Rahmatov, O.I.; Faslyeva, N.D.; Tchuiko, A. G.

doi:10.1016/0022-5088(88)90420-1

Cited by 19 publications

(4 citation statements)

References 8 publications

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“…In the case of Pr(1), h and i are too close for them to be occupied simultaneously by Sb and Ga, respectively; if site i is ignored, then the commonly observed nine-coordinate monocapped square antiprism of Sb atoms results. The RE −Sb and RE −Ga distances (Table ) in both structures are reasonable when compared with those found in the binary compounds LaSb 2 (3.183−3.432 Å), PrSb 2 (3.151−3.377 Å), LaGa 2 (3.335 Å), and PrGa 2 (3.278 Å) …”

Section: Resultssupporting

confidence: 75%

Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs

Mills

Mar

2000

Inorg. Chem.

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The ternary rare-earth gallium antimonides La13Ga8Sb21 and RE 12Ga4Sb23 (RE = La−Nd, Sm) have been synthesized through reaction of the elements. The structures of La13Ga8Sb21 (hexagonal, space group -P6/mmm, Z = 1, a = 17.657(2) Å, c = 4.3378(7) Å) and Pr12Ga4Sb23 (orthorhombic, space group -Immm, Z = 2, a = 4.2612(3) Å, b = 19.4070(13) Å, c = 26.3972(18) Å) have been determined by single-crystal X-ray diffraction. Both structures contain groupings of RE 6 trigonal prisms that extend as columns through sharing of the triangular faces. Isolated trigonal planar GaSb3 units result from centering adjacent trigonal prisms by Ga or Sb atoms. Channels outlined by Sb square ribbons linked through Ga−Ga bonding enclose the triangular assemblies of trigonal prisms. The Ga−Ga bonding is manifested as Ga6-rings in La13Ga8Sb21 but as Ga2-pairs in Pr12Ga4Sb23. Structural relationships are described between La13Ga8Sb21 and Ba0.8Hf12As17.7, and between Pr12Ga4Sb23 and La6MnSb15.

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Section: Resultssupporting

confidence: 75%

Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs

Mills

Mar

2000

Inorg. Chem.

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“…The addition of the interstitial bromine atom to these supposed binary La Sb examples increases both parameters uniformly by &1.8% and the volume by 5.5% (Table 1) as expected from studies of the known La Ge Z derivatives, considering that the larger main-group element Sb is present. On the other hand, the consistent literature data for Pr Sb (22,24) afford less believable increases on bromide addition, 1.6% in a but only 0.3% (0.019(6) A s ) in c, especially when it is noted that the added bromine Z atoms are still only 3.26 A s (c/2) apart along that axis. (Carbon is known to produce such a contraction in c in La Ge and La Pb (11,12).)…”

Section: R Pn Brmentioning

confidence: 80%

Lanthanum and Praseodymium Bromide Pnictides. A Convergence of Interstitial Chemistry in Cluster Halides and Intermetallic Pnictides

Jensen

Hoistad

Corbett

1999

Journal of Solid State Chemistry

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“…LeBail refinement of the impurity phase for R = Ce showed that the impurity peaks fulfilled the extinction conditions of the orthorhombic space group Cmca with lattice constants a = 6.3 Å, b = 6.1 Å and c = 18.21 Å, corresponding to the known phase of CeSb 2 [17] with the LaSb 2 type structure. A cubic phase with extinction conditions corresponding to the space group Fm − 3m with a = 6.3 Å was found for the Pr-compound pointing to the presence of PrSb [18] as impurity phase. Tb 3 Sc 2 Sb 3 [14] with a = 11.61 Å, b = 9.00 Å and c = 7.82 Å was identified as the impurity phase in TbScSb.…”

Section: Room Temperature High Resolution Neutron Diffractionmentioning

confidence: 96%

Electronically- and crystal-structure-driven magnetic structures and physical properties of RScSb (R = rare earth) compounds: a neutron diffraction, magnetization and heat capacity study

Ritter¹,

Dhar²,

Kulkarni³

et al. 2014

J. Phys.: Condens. Matter

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The synthesis of the new equiatomic RScSb (R = La-Nd, Sm, Gd-Tm, Lu, Y) compounds has been recently reported. These rare earth compounds crystallize in two different crystal structures, adopting the CeScSi-type (I4/mmm) for the lighter R (La-Nd, Sm) and the CeFeSi-type (P4/nmm) structure for the heavier R (R = Gd-Tm, Lu, Y). Here we report the results of neutron diffraction, magnetization and heat capacity measurements on some of these compounds (R = Ce, Pr, Nd, Gd and Tb). Band structure calculations have also been performed on CeScSb and GdScGe (CeScSi-type), and on GdScSb and TbScSb (CeFeSi-type) to compare and understand the exchange interactions in CeScSi and CeFeSi structure types. The neutron diffraction investigation shows that all five compounds order magnetically, with the highest transition temperature of 66 K in TbScSb and the lowest of about 9 K in CeScSb. The magnetic ground state is simple ferromagnetic (τ = [0 0 0]) in CeScSb, as well in NdScSb for 32 > T > 22 K. Below 22 K a second magnetic transition, with propagation vector τ = [¼ ¼ 0], appears in NdScSb. PrScSb has a magnetic structure within, determined by mostly ferromagnetic interactions and antiferromagnetic alignment of the Pr-sites connected through the I-centering (τ = [1 0 0]). A cycloidal spiral structure with a temperature dependent propagation vector τ = [δ δ ½] is found in TbScSb. The results of magnetization and heat capacity lend support to the main conclusions derived from neutron diffraction. As inferred from a sharp peak in magnetization, GdScSb orders antiferromagnetically at 56 K. First principles calculations show lateral shift of spin split bands towards lower energy from the Fermi level as the CeScSi-type structure changes to the CeFeSi-type structure. This rigid shift may force the system to transform from exchange split ferromagnetic state to the antiferromagnetic state in RScSb compounds (as seen for example in GdScSb and TbScSb) and is proposed to explain the change-over from a ferromagnetic structure as found in the CeScSi-type compounds CeScSb and NdScSb to the antiferromagnetic state as found in TbScSb and GdScSb.

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The phase diagram of the PrSb system

Cited by 19 publications

References 8 publications

Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs

Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs

Lanthanum and Praseodymium Bromide Pnictides. A Convergence of Interstitial Chemistry in Cluster Halides and Intermetallic Pnictides

Electronically- and crystal-structure-driven magnetic structures and physical properties of RScSb (R = rare earth) compounds: a neutron diffraction, magnetization and heat capacity study

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The phase diagram of the PrSb system

Cited by 19 publications

References 8 publications

Rare-Earth Gallium Antimonides La13Ga8Sb21 and RE12Ga4Sb23 (RE = La−Nd, Sm): Linking Sb Ribbons by Ga6-Rings or Ga2-Pairs

Rare-Earth Gallium Antimonides La13Ga8Sb21 and RE12Ga4Sb23 (RE = La−Nd, Sm): Linking Sb Ribbons by Ga6-Rings or Ga2-Pairs

Lanthanum and Praseodymium Bromide Pnictides. A Convergence of Interstitial Chemistry in Cluster Halides and Intermetallic Pnictides

Electronically- and crystal-structure-driven magnetic structures and physical properties of RScSb (R = rare earth) compounds: a neutron diffraction, magnetization and heat capacity study

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Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs

Rare-Earth Gallium Antimonides La₁₃Ga₈Sb₂₁ and RE₁₂Ga₄Sb₂₃ (RE = La−Nd, Sm): Linking Sb Ribbons by Ga₆-Rings or Ga₂-Pairs