Representatives of the structure type Sc2Re3Si4inR−{Ti, Zr,Hf}−Si systems (R– rare-earth metal)

Muts, Nataliya; Tokaychuk, Ya.; Boyko, Marina; Demchenko, P.; Gladyshevskii, R.

doi:10.15407/dopovidi2014.12.128

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Orthorhombic Sm 5 Ge 4 -or Gd 5 Si 4 -type structures have been reported for all binary R 5 Si 4 and R 5 Ge 4 compounds with R = Y, Gd-Lu, except for Lu 5 Si 4 , Tm 5 Si 4 , and Lu 5 Ge 4 . [4]. A certain homogeneity range was found for the Ce 2 Sc 3 Si 4 -type phase in the Tb-Ti-Ge system at 1070 K [10], Tb 1.35-2 Ti 3.65-3 Ge 4 , where the phase was observed in equilibrium with the binary compound Tb 5 Ge 4 (Sm 5 Ge 4 type).…”

Section: Introductionmentioning

confidence: 88%

New compounds with Sc2Re3Si4-type structure in the systems R–{Zr,Hf}–Ge

BOYKO¹,

Muts²,

Tokaychuk³

et al. 2015

Chem. Met. Alloys

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were synthesized and characterized by means of X-ray diffraction and energy-dispersive analyses. The crystal structures of two alloys in the Tm-Zr-Ge and Ho-Hf-Ge systems (Tm 0.88(4) Zr 4.12(4) Ge 4 , a = 7.3457(5), c = 13.388(1) Å; Ho 1.38(8) Hf 3.62(8) Ge 4 , a = 7.3139(6), c = 13.3550(13) Å) were refined by the Rietveld method on X-ray powder diffraction data. In both structures one of the atom sites was found to be occupied by a statistical mixture of rare-earth metal and Zr (Hf) atoms.

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Section: Introductionmentioning

confidence: 88%

New compounds with Sc2Re3Si4-type structure in the systems R–{Zr,Hf}–Ge

BOYKO¹,

Muts²,

Tokaychuk³

et al. 2015

Chem. Met. Alloys

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“…A number of ~R 2 T 3 X 4 compounds, where R is a heavy rare-earth metal, T is a IVB group element, and X is a IVA group element, form in the systems {Gd,Tb,Dy,Ho,Еr,Tm,Yb,Lu}-{Ti,Zr,Hf}-{Si,Ge} [1][2][3][4][5][6][7][8][9][10]. Their crystal structures belong to two different structure types: Sc 2 Re 3 Si 4 [11], which is an ordered derivative of the binary Zr 5 Si 4 type [12] (Pearson symbol tP36, space group P4 1 2 1 2), and Ce 2 Sc 3 Si 4 [13], which is an ordered derivative of the binary Sm 5 Ge 4 type [14] (oP36, Pnma).…”

Section: Introductionmentioning

confidence: 99%

R2-xTi3+xGe4 compounds in the R–Ti–Ge (R = Gd–Lu) systems

Bachynska¹,

Muts²,

Miliyanchuk³

et al. 2018

Chem. Met. Alloys

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The existence of five R 2-x Ti 3+x Ge 4 compounds (R = Gd, Tb, Dy, Ho, Er) was confirmed at 600°C and two new compounds, Tm 1.79(2) Ti 3.21(2) Ge 4 and Lu 1.74(2) Ti 3.26(2) Ge 4 , were found. No ~R 2 Ti 3 Ge 4 compound was observed for Yb. All the compounds crystallize with partly ordered variants of the structure type Sm 5 Ge 4 (Pearson symbol oP36, space group Pnma). On going from gadolinium to lutetium, the unit-cell parameters are reduced, due to the lanthanide contraction, but also due to the fact that the refined composition becomes richer in Ti. One of the metal-atom sites located between the structural slabs was found to be fully occupied by titanium, whereas the other one is mainly or fully occupied by the rare-earth metal. The site located inside the slabs (rhombic dodecahedral coordination) is preferentially occupied by Ti.

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Representatives of the structure type Sc₂Re₃Si₄inR−{Ti, Zr,Hf}−Si systems (R– rare-earth metal)

Cited by 2 publications

References 6 publications

New compounds with Sc2Re3Si4-type structure in the systems R–{Zr,Hf}–Ge

New compounds with Sc2Re3Si4-type structure in the systems R–{Zr,Hf}–Ge

R2-xTi3+xGe4 compounds in the R–Ti–Ge (R = Gd–Lu) systems

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