The isothermal section at 600 ∘C of the ternary Pr–Au–Sn phase diagram

Mazzone, D.; Marazza, R.; Riani, Paola; Zanicchi, G.; Cacciamani, G.; Fornasini, M. L.; Manfrinetti, P.

doi:10.1016/j.calphad.2008.09.017

Cited by 13 publications

(21 citation statements)

References 49 publications

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“…Within the confines of rare earth-gold compounds, full structural data via single-crystal analysis has only been reported for Nd 3 Au 4 (Fornasini & Saccone, 1994;Saccone et al, 1999). However, the phase has been preliminarily identified in Y-Au, Pr-Au, and Gd-Au, and suggested for Sm-Au systems (Saccone et al, 1996;Saccone, Maccio et al, 1997;Mazzone et al, 2009). While the majority of members within the structure type contain rare earth elements, the possibility of other active metal formation with gold has been confirmed with Ca 3 Au 4 (Henry & Weller, 1999), opening wider horizons for possible substitutions.…”

Section: Introductionmentioning

confidence: 95%

“…The structure itself has significantly more representatives and closely related phases due to various ternary compounds possible via anion mixing, and various crystallographically similar amalgams (Tambomino et al, 2015;McMasters et al, 1971). Certain R 14 Au 51 compounds (namely Nd 14 Au 51 and Pr 14 Au 51 ) have also been shown to have some form of phase width away from being strict line compounds (Saccone, Maccio et al, 1997;Saccone et al, 1999;Mazzone et al, 2009). Forming with a majority of the rare earths and gold, there is a full structural report available for every known R 14 Au 51 compound except Y 14 Au 51 .…”

Section: Introductionmentioning

confidence: 99%

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Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

2017

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YAu (triyttrium tetragold) and YAu (tetradecayttrium henpentacontagold), two binary representatives of Au-rich rare earth (R) systems crystallize with the space groups R-3 and P6/m, adopting the PuPd and GdAg structure types, respectively (Pearson symbols hR42 and hP65). A variety of binary R-Au compounds have been reported, although only a few have been investigated thoroughly. Many reports lack information or misinterpret known compounds reported elsewhere. The PuPd type is fairly common for group 10 elements Ni, Pd, and Pt, while Au representatives are restricted to just five examples, i.e. CaAu, PrAu, NdAu, GdAu, and ThAu. SmAu is suspected to be SmAu due to identical symmetry and close unit-cell parameters. The PuPd structure type allows for full substitution of the position of the rare earth atom by more electronegative and smaller elements, i.e. Ti and Zr. The GdAg type instead is more common for the group 11 metals, while rare representatives of group 12 are known. YAu can be represented as a tunnel structure with encapsulated cations and anionic chains. Though tunnels are present in YAu, this structure is more complex and is best described in terms of polyhedral `pinwheels' around the tunnel forming polyhedra along the c axis.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

2017

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“…At this point we need to mention that a phase of composition Pr 2 Au 3 Sn 6 was already reported by Mazzone et al during a study of the 870 K isothermal section of the Pr‐Au‐Sn phase diagram. Based on X‐ray powder diffraction data, a tetragonal body‐centered unit cell with a = 456.9(2) and c = 2589(1) pm was deduced and the Nd 2 Cu 3 Sn 6 type ( I 4 mm ) was assigned.…”

Section: Resultsmentioning

confidence: 71%

“…Nevertheless, this is the usual influence of the lanthanide contraction and is comparable to the many other series of ternary rare earth transition metal stannides. [1,3] At this point we need to mention that a phase of composition Pr 2 Au 3 Sn 6 was already reported by Mazzone et al [31] during a study of the 870 K isothermal section of the Pr-Au-Sn phase diagram. Based on X-ray powder diffraction data, a tetragonal body-centered unit cell with a = 456.9(2) and c = 2589(1) pm was deduced and the Nd 2 Cu 3 Sn 6 type (I4mm) was assigned.…”

Section: Crystal Chemistrymentioning

confidence: 81%

Tin‐rich Phases RE₂Au₃Sn₆ with RE = La, Ce, Pr, Nd, Sm – Synthesis, Structure, Magnetic Properties, and ¹¹⁹Sn Mössbauer Spectra

Engelbert

Janka

Klenner

et al. 2020

Zeitschrift anorg allge chemie

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The stannides RE 2 Au 3 Sn 6 (RE = La, Ce, Pr, Nd, Sm) were synthesized from the elements by arc-melting. Small single crystals were grown by annealing samples in sealed tantalum tubes in an induction furnace with a special annealing sequence. The polycrystalline phases were characterized through their X-ray powder diffraction pattern. The structures of Ce 2 Au 3 Sn 6 , Pr 2 Au 3 Sn 6 , and Nd 2 Au 3 Sn 6 were refined from single-crystal X-ray diffractometer data. The RE 2 Au 3 Sn 6 stannides crystallize with the orthorhombic La 2 Zn 3 Ge 6 type, space group Cmcm. The basic structural building units are Au1@Sn 4 tetrahedra and Au2@Sn 5 square pyramids. These units are condensed to layers and the structure can be described by a simple stacking of tetrahedral and pyramidal layers with the rare earth cations in between. Tem

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“…We detected such a shell in 18 intermetallic compounds, including known approxi mants of quasicrystals: AlCa 3 Cd 17 [13], Yb 25.39 Zn 138.16 Al 7.66 [14], CaCd 6 [15], Ce 3 Au 14.2 Sn 2.7 [16], Ce 6 Cd 37 [17], Eu 3 Cd 19 [15], Ru 3 Be 17 [18], YCd 6 [19], HfNi 2.15 Ca 3.85 [20], YbCd 6 [21], Al 39 Fe 2 Pd 21 [22], Yb 25.05 Zn 146.83 [14], Pr 3 Cd 18.18 [23], PrAu 4.3 Sn 1.77 [15], Ca 3 (Au,Ge) 19 , Yb 3 (Au,Ge) 19 , Ca 3.25 (Au,Ge) 18 , Yb 3.25 (Au,Ge) 18 [24]. Figure 4 illustrates such a shell in CaCd 6 .…”

Section: Resultsmentioning

confidence: 99%

On similarity of structure of icosahedral viral capsids and shells of metallic nanoclusters

2013

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TOPOS software has been applied for searching for topological types of viral capsids-virus shells generated by self assembly of proteins into geometrically ordered structure (VIPERdb database). Three topo logical capsid types that characterize packing of capsomeres (1) in the form of 12 vertex icosahedron (its ver tex are occupied with pentamers), (2) in the form of 32 vertex polyhedron (12 pentamers + 20 hexamers), and (3) in the form of 62 vertex polyhedron (12 pentamers + 50 hexamers) have been outlined. The three mentioned polyhedral shells have been presented in the form of graphs of edge nets and applied for searching for relevant nanocluster fragments in the developed database of intermetallic compounds (25808 structures). It has been established that local structures in the form of icosahedral shells can be met in 6403 (27.1%) inter metallic compounds. Thirty two atom shells have been found in 469 (2.0%) intermetallic compounds; fur thermore, they are always the second shells of Bergman nanoclusters where the first shell is icosahedron. Sixty two atom polyhedral shells in intermetallic compounds have not been found in intermetallic com pounds; however, a modified 110 atom shell has been obtained on its basis, which is a polyhedron with 72 pentagonal faces. Such a shell has been established in 18 intermetallic compounds, including quasicrystal approximants AlCa 3 Cd 17 , CaCd 6 , Eu 3 Cd 19 , HfNi 2.15 Ca 3.85 , etc.

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The isothermal section at 600 ∘C of the ternary Pr–Au–Sn phase diagram

Cited by 13 publications

References 49 publications

Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

Tin‐rich Phases RE₂Au₃Sn₆ with RE = La, Ce, Pr, Nd, Sm – Synthesis, Structure, Magnetic Properties, and ¹¹⁹Sn Mössbauer Spectra

On similarity of structure of icosahedral viral capsids and shells of metallic nanoclusters

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The isothermal section at 600 ∘C of the ternary Pr–Au–Sn phase diagram

Cited by 13 publications

References 49 publications

Crystal structures and new perspectives on Y3Au4and Y14Au51

Crystal structures and new perspectives on Y3Au4and Y14Au51

Tin‐rich Phases RE2Au3Sn6 with RE = La, Ce, Pr, Nd, Sm – Synthesis, Structure, Magnetic Properties, and 119Sn Mössbauer Spectra

On similarity of structure of icosahedral viral capsids and shells of metallic nanoclusters

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Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

Crystal structures and new perspectives on Y₃Au₄and Y₁₄Au₅₁

Tin‐rich Phases RE₂Au₃Sn₆ with RE = La, Ce, Pr, Nd, Sm – Synthesis, Structure, Magnetic Properties, and ¹¹⁹Sn Mössbauer Spectra