Refinement of the Ni3P Structure.

Rundqvist, Stig; Hassler, Eivind; Lundvik, Lars; Motzfeldt, K.; Theander, Olof; Flood, H.

doi:10.3891/acta.chem.scand.16-0242

Cited by 73 publications

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“…Additives like V, Cr, Mn and Al turn the material into an n-type semiconductor. In particular, the doping with Mn poses intriguing fundamental issues related to the occurrence of metastable phases due to the structural difference between iron and manganese silicides and also related to the occupancy of the two non-equivalent Fe sites in the β-FeSi 2 structure [2]. In this frame, we have carried out a study of the sequence of phase formations of stoichiometric Fe 1−x Mn x Si 2 (0.00 ≤ x ≤ 0.12) mixtures prepared by mechanical alloying from small pieces of the pure elements.…”

Section: Introductionmentioning

confidence: 99%

Formation of Mn-doped iron silicides by ball milling

et al. 2006

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Using X-ray diffraction (XRD) and Mössbauer spectroscopy, we have studied the sequence of phase formations in the solid Mn-doped iron silicide series Fe 1−x Mn x Si 2 , with 0.00 ≤ x ≤ 0.12, in samples prepared by mechanical alloying from the pure elements. The milling was carried out at room temperature in Ar atmosphere in a horizontal mill for 15 h. The XRD patterns display broad lines, which can be ascribed to stable and metastable iron silicides like β-FeSi 2 , ɛ-FeSi, α-FeSi 2 , MnSi, and Si. The set of hyperfine parameters obtained support the coexistence of β-FeSi 2 , α-FeSi 2 and ɛ-FeSi, in agreement with the XRD results. No replacement of Fe by Mn atoms in the regular sites of β-FeSi 2 has been observed.

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Section: Introductionmentioning

confidence: 99%

Formation of Mn-doped iron silicides by ball milling

et al. 2006

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“…For example, in the series with the general formula R n(n-1) T (n+1)(n+2) P n(n+1)+1 (R = Zr or rare earth metal, T = 3d or 4d transition metal, n = 1 to 6), Fe 2 P (n = 0), [1] Zr 2 Fe 12 P 7 (n = 2), [2] Zr 6 Ni 20 P 13 (n = 3), [3] (La,Ce) 12 Rh 30 P 21 (n = 4), [4] Sm 20 Ni 42 P 31 (n = 5), and Tb 30 Ni 56 P 43 (n = 6) [5] have been described thoroughly. [6][7][8] The corresponding arsenides with n = 4 (Dy 12 Ni 30 As 21 and Tb 12 Ni 30 As 21 ) [9] and n = 5 [R 20 Ni 42 As 31 (R = La, Ce, Pr, Nd, Sm)] [10] have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Complex Intermetallic Compounds: CaNi₅Ge₃, Ca₁₅Ni₆₈Ge₃₇, and Ca₇Ni₄₉Ge₂₂ – Three Multifaceted Ni‐Ge Framework Structures Combining the Structural Motifs of Ni₃Ge and CaNi₂Ge₂

et al. 2011

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The intermetallic compounds, CaNi5Ge3, Ca15Ni68Ge37, and Ca7Ni48.9(4)Ge22.1(4), were prepared by arc‐melting of the elements and subsequent heating in welded tantalum ampoules. The compounds were investigated by powder and single‐crystal X‐ray diffraction methods. Each of the three compounds crystallized in a different structure type, namely, CaNi5Ge3 in the space group P4/mbm, a = 8.0855(1) Å, c = 7.8466(1) Å, wR2 = 0.054, 439 F2 values, 31 variable parameters; Ca15Ni68Ge37 in the space group P$\bar {6}$2m, a = 22.436(2) Å, c = 3.9684(4) Å, wR2 = 0.096, 1849 F2 values, 133 variable parameters; Ca7Ni48.9(4)Ge22.1(4) in the space group P6/mmm, a = 17.381(4) Å, c = 4.046(1) Å, wR2 = 0.082, 693 F2 values, 59 variable parameters. The crystal structures consist of complex 3D networks of nickel and germanium atoms that have common motifs, namely, different sections of the Ni3Ge structure, as well as, Ca‐centered hexagonal prisms of Ni and Ge, which have been observed in the CaNi2Ge2 structure. As the Ca content decreases, the Ni‐Ge substructures form one‐, two‐, and three‐dimensional networks. The disorder in Ca7Ni48.9(4)Ge22.1(4) is explained by a structural frustration. The electronic structure and chemical bonding of CaNi5Ge3 is discussed by means of band‐structure calculations.

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“…In addition, these workers reported a new phase, Ti^S, to have a structure similar to the.€(Fe-P-B)-type structure reported by Rundqvist (27).…”

Section: Single Crystal Methodssupporting

confidence: 57%

Studies of solid compounds of group IV and V transition metals formed at high temperature: I. The crystal structures of Ti2S, Nb21S8, and Nb2Se; II. The metal-rich region of the zirconium-sulfur system

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Refinement of the Ni3P Structure.

Cited by 73 publications

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Formation of Mn-doped iron silicides by ball milling

Formation of Mn-doped iron silicides by ball milling

Complex Intermetallic Compounds: CaNi₅Ge₃, Ca₁₅Ni₆₈Ge₃₇, and Ca₇Ni₄₉Ge₂₂ – Three Multifaceted Ni‐Ge Framework Structures Combining the Structural Motifs of Ni₃Ge and CaNi₂Ge₂

Studies of solid compounds of group IV and V transition metals formed at high temperature: I. The crystal structures of Ti2S, Nb21S8, and Nb2Se; II. The metal-rich region of the zirconium-sulfur system

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Refinement of the Ni3P Structure.

Cited by 73 publications

References 0 publications

Formation of Mn-doped iron silicides by ball milling

Formation of Mn-doped iron silicides by ball milling

Complex Intermetallic Compounds: CaNi5Ge3, Ca15Ni68Ge37, and Ca7Ni49Ge22 – Three Multifaceted Ni‐Ge Framework Structures Combining the Structural Motifs of Ni3Ge and CaNi2Ge2

Studies of solid compounds of group IV and V transition metals formed at high temperature: I. The crystal structures of Ti2S, Nb21S8, and Nb2Se; II. The metal-rich region of the zirconium-sulfur system

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Complex Intermetallic Compounds: CaNi₅Ge₃, Ca₁₅Ni₆₈Ge₃₇, and Ca₇Ni₄₉Ge₂₂ – Three Multifaceted Ni‐Ge Framework Structures Combining the Structural Motifs of Ni₃Ge and CaNi₂Ge₂