Crystal structure of new ternary compounds Al2R11Ge8 (R=Y, Gd, Tb, Dy, Ho, Er) and thermal properties of Al2Er11Ge8

Zeng, Lingmin; He, Wei; Shen, Wenjun; Lu, M.

doi:10.1016/j.jallcom.2012.02.171

Cited by 6 publications

(5 citation statements)

References 15 publications

(11 reference statements)

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“…The lattice parameters a = 0.43384 (6) nm, b = 0.70193(1) nm, c = 0.75617(1) nm, Z = 4, D calc = 8.512 g/cm 3 . And also, V = 0.23027 nm 3 , R p = 0.0996, R wp = 0.1277.…”

Section: Resultsmentioning

confidence: 99%

“…The lattice parameters a = 0.43384 (6) nm, b = 0.70193(1) nm, c = 0.75617(1) nm, Z = 4, D calc = 8.512 g/cm 3 . And also, V = 0.23027 nm 3 , R p = 0.0996, R wp = 0.1277. The atomic coordinates, occupancy and thermal parameters are summarized in Table 2.…”

Section: Resultsmentioning

confidence: 99%

“…The rare earth element terbium has attracted much attention in the last few years because its compounds have a lot of excellent properties such as superconductivity and coexistence of magnetism (e.g. [1][2][3]). Tb-Co-Ga ternary system is very important in terbium's alloy system.…”

Section: Introductionmentioning

confidence: 99%

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Crystal Structure of the New Compound TbCo0.67Ga1.33

Liang

Shen

Zeng

et al. 2015

AMR

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A new ternary compound TbCo0.67Ga1.33 was discovered and studied by means of X-ray powder diffraction technique. The crystal structure of the new compound was refined by using Rietveld method from X-ray powder diffraction data. This compound crystallizes in the orthorhombic with the CeCu2 structure type( space group Imma, a = 0.43384(6) nm, b = 0.70193(1) nm, c = 0.75617(1) nm, Z = 4, and Dcalc = 8.512 g/cm3 ). The Rietveld refinement results were Rp = 0.0996, Rwp = 0.1277.

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“…The lattice parameters a = 0.43384 (6) nm, b = 0.70193(1) nm, c = 0.75617(1) nm, Z = 4, D calc = 8.512 g/cm 3 . And also, V = 0.23027 nm 3 , R p = 0.0996, R wp = 0.1277.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Crystal Structure of the New Compound TbCo0.67Ga1.33

Liang

Shen

Zeng

et al. 2015

AMR

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“…In the ternary systems R ‐Al‐Ge ( R = rare‐earth metal) between two ( R = Lu) and eleven ( R = Sm) compounds are known 1–8. In total, some 100 rare‐earth metal alumogermanides have been synthesized and characterized.…”

Section: Introductionmentioning

confidence: 99%

Tb₂Al₃Ge₃, a New Partly Disordered Structure Type with Al₃ Triangles

Gladyshevskii

Lutsyshyn

Černý

et al. 2014

Zeitschrift anorg allge chemie

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Using X‐ray diffraction it was established that the actual composition of the ternary compound reported as “TbAl2Ge” is close to Tb2Al3Ge3 (refined Tb2Al3.039(1)Ge3). Differential thermal analysis showed that the compound exists in a narrow temperature range from 618 to 748 °C. The crystal structure was determined from X‐ray powder and single‐crystal diffraction data. An initial model was constructed from CaAl2Si2‐ and AlB2‐ (or LiBaSi‐) type slabs. A more detailed investigation revealed that, instead of LiBaSi‐type slabs (where the small atoms form planar nets), the structure contains ScAuSi‐type slabs (corrugated nets), where 1/6 of the Tb atoms have been removed in an ordered way, leading to a rhombohedral superlattice. The final structure represents a new structure type: Pearson symbol hR234–41.06, space group R$\bar{3}$c, a = 7.2432(3), c = 87.998(8) Å. Part of the Al atoms in the Tb‐deficient ScAuSi‐type slabs occupy a site that forms Al3 triangles. The structure of Tb2Al3Ge3 is thus closely related to the rhombohedral ErNi3Al9 and orthorhombic Y2Co3Ga9 structure types, which contain one‐atom thick Er2Al3 (Y2Ga3) layers formed by rare‐earth metal atoms and Al3 (Ga3) triangles. Compounds isotypic with Tb2Al3Ge3 were found in the systems Y‐Al‐Ge and Gd‐Al‐Ge.

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“…The existence of two previously known compounds, GdAl 2 Ge 2 (structure type Ce 2 SO 2 [2]) and GdAlGe (α-ThSi 2 [3]), was confirmed, the formation of a new ternary intermetallide of approximate composition GdAlGe 2 with unknown structure was established, and the isothermal cross-section of the phase diagram was constructed. Six more compounds were later reported in the same system: Gd 2 AlGe 6 (La 2 AlGe 6 ) [ [8], and Gd 11 Al 2 Ge 8 (Sc 11 Al 2 Ge 8 ) [9]. The compound ~GdAlGe 2 probably corresponds to the compound Gd 2 Al 1.4 Ge 5.…”

Section: Introductionmentioning

confidence: 99%

Crystal structures of the compounds GdAl0.09Ge2.07 and Gd2AlGe3

Pukas¹

2014

Chem. Met. Alloys

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Two gadolinium alumogermanides, GdAl 0.09(3) Ge 2.07(4) and Gd 2 AlGe 3 , were synthesized by arc melting and their crystal structures were studied by X-ray powder diffraction. The compound GdAl 0.09 Ge 2.07 crystallizes with an ErGe 2.16-type structure: Pearson symbol oS16, space group Cmcm, a = 4.1704(5), b = 16.447(2), c = 3.9820(5) Å. It is the second known representative of the structure type ErGe 2.16 (a binary variant of the type CeNiSi 2) among rare-earth alumogermanides; in both cases Al was found to partially substitute for Ge on one of the fully occupied Ge sites. The compound Gd 2 AlGe 3 is isostructural to Y 2 AlGe 3 : Pearson symbol oP24, space group Pnma, a = 6.8031(2), b = 4.2282(1), c = 17.8165(5) Å, and is the ninth representative of this type. Common to the two structures is the presence of layers of Ge-centered Gd 6 trigonal prisms sharing the bases and two of the three lateral faces.

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Crystal structure of new ternary compounds Al2R11Ge8 (R=Y, Gd, Tb, Dy, Ho, Er) and thermal properties of Al2Er11Ge8

Cited by 6 publications

References 15 publications

Crystal Structure of the New Compound TbCo<sub>0.67</sub>Ga<sub>1.33</sub>

Crystal Structure of the New Compound TbCo<sub>0.67</sub>Ga<sub>1.33</sub>

Tb₂Al₃Ge₃, a New Partly Disordered Structure Type with Al₃ Triangles

Crystal structures of the compounds GdAl0.09Ge2.07 and Gd2AlGe3

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Crystal structure of new ternary compounds Al2R11Ge8 (R=Y, Gd, Tb, Dy, Ho, Er) and thermal properties of Al2Er11Ge8

Cited by 6 publications

References 15 publications

Crystal Structure of the New Compound TbCo<sub>0.67</sub>Ga<sub>1.33</sub>

Crystal Structure of the New Compound TbCo<sub>0.67</sub>Ga<sub>1.33</sub>

Tb2Al3Ge3, a New Partly Disordered Structure Type with Al3 Triangles

Crystal structures of the compounds GdAl0.09Ge2.07 and Gd2AlGe3

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Tb₂Al₃Ge₃, a New Partly Disordered Structure Type with Al₃ Triangles