The rare earth rhenium aluminides Y7.28Re12Al61.38 and Ho7.32Re12Al61.48

Niemann, Sabine; Jeitschko, Wolfgang

doi:10.1016/0925-8388(94)01449-3

Cited by 20 publications

(17 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This structure is characterized by a partly ordered distribution of the Zn and Al atoms. The positions with the Zn atoms have a smaller coordination number (CN) (10 -12) and the positions with a lager CN (12,13) cube, formed by the T5 atoms, is the characteristic feature of the HoZn 5 Al 3 structure (Fig. 1, i).…”

Section: Resultsmentioning

confidence: 99%

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

Stel'makhovych

Kuz'ma

2006

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

The crystal structures of several new compounds have been determined using X-ray analysis. The intermetallic compound HoZn 5 Al 3 (a = 8.586(3), c = 16.538(5)Å, R F = 0.0413, R W = 0.0521) has its own structure type (space group I4/mmm), which has been found for the first time.The following compounds are isostructural with the previous one: Å, R I = 0.085, R P = 0.112) adopts the Yb 8 Cu 17 Al 49 -type structure (space group I4/mmm). The relationship between the HoZn 5 Al 3 -type and the Yb 8 Cu 17 Al 49 -type structures is discussed.

show abstract

Section: Resultsmentioning

confidence: 99%

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

Stel'makhovych

Kuz'ma

2006

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

show abstract

“…All erbium atoms are situated in layers of the type B. The platinum atoms are in the layers A [Pt(3) and Pt (5)] and A' [Pt(1), Pt(2), and Pt(4)]. All of these layers have trigonal axes and this is the reason for the pseudo-trigonal symmetry of the structure, which took some time to rationalize and which we want to discuss now.…”

Section: Discussionmentioning

confidence: 99%

“…4 in a way to facilitate comparisons. They have CNs of 11 (the aluminum atoms with the numbers 1, 3, 6, 7, and 9), 12 (2, 4, 8, 10, 11, and 12), and 14 for Al (5). The Al(4) atom has no Er (Y) neighbor and the others between one and three; they have between two and four platinum and between six and nine aluminum neighbors.…”

Section: Discussionmentioning

confidence: 99%

“…In the course of our studies of ternary compounds of the rare earth and transition metals with a high content of aluminum we have already reported several compounds with late transition metals: YbFe 2 Al 10 [1] and the isotypic compounds RT 2 Al 10 with T = Fe, Ru, and Os as transition metal components [2]; the manganese and rhenium compounds RMn 2 Al 10 and RRe 2 Al 10 with CaCr 2 Al 10 -type structure [3], where R are early rare earth elements; RRe 2 Al 10 [4] with a new structure type, where R are the late lanthanoids; the series R 7+x Re 2 Al 61+y [5,6], and finally EuCo 2 Al 9 with BaFe 2 Al 9 -type structure [7]. We have now extended our investigations to include palladium and platinum as transition metal components.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ternary Rare Earth Metal Palladium and Platinum AluminidesR4Pd9Al24 andR4Pt9Al24

Thiede¹,

Fehrmann²,

Jeitschko³

1999

Z. anorg. allg. Chem.

Self Cite

View full text Add to dashboard Cite

The fifteen intermetallic compounds R4Pd9Al24 (R = Gd–Tm) and R4Pt9Al24 (R = Y, Gd–Lu) were prepared by reaction of the elemental components. Their crystal structure was determined from single‐crystal X‐ray data of Er4Pt9Al24. It is pseudo‐trigonal with triclinic symmetry: P 1, a = b = 747.5(2) pm, c = 1306.7(4) pm, α = 100.99(2)°, β = 95.47(2)°, γ = 60.00(3)°, Z = 1, R = 0.052 for 2593 structure factors and 110 variable parameters. The structure is closely related to that of Y2Co3Ga9. Both may be described as stacking variants of each other. They consist of layers of the compositions PtAl2 (CoGa2), and Er2Al3 (Y2Ga3), designated A and B, respectively. These layers are stacked in the five‐ and four‐layer sequences ABAAB (Er4Pt9Al24) and ABAB (Y2Co3Ga9). The layers PtAl2 and CoGa2 are similar to the hexagonal close packed layers in the TiSi2‐, CrSi2‐, and MoSi2‐type structures. The structure of Er4Pt9Al24 contains a monoclinic subcell, where the layers Er2Al3 are disordered. A partial disorder of this kind, which could be ascribed to twinning or to the intergrowth with another stacking variant, was found during the structure refinement of the isotypic compound Y4Pt9Al24: a = b = 749.0(2) pm. c = 1309.3(4) pm, α = 100.99(2)°, β = 95.48(2)°, γ = 60.00(3)°, R = 0.031 for 1435 structure factors and 128 variable parameters.

show abstract

“…Apparently, only two such ternary compounds have been reported: rhombohedral Ce2NisZn2 with a new ordered substitution variant of the Er2Co7 type structure and the hexag onal compound CeNi2Zn with YRl^Si type struc ture [1]. We have recently characterized a large number of ternary rare earth (R) transition metal (T) aluminides with a high content of aluminum: R6T4AI43 [2,3], RT2A120 [4], R7+, Rei2Al61+, [5], and RFe2Alio [6 ]. In this context we were inter ested to know whether similar compounds could be prepared, where zinc is taking the place of alu minum.…”

Section: Introductionmentioning

confidence: 99%

Ternary Rare Earth Transition Metal Zinc Compounds RT₂Zn₂₀ with T = Fe, Ru, Co, Rh, and Ni

Nasch

Jeitschko

Rodewald

1997

Zeitschrift Für Naturforschung B

Self Cite

172

115

View full text Add to dashboard Cite

A norganisch-C hem isches Institut, U niversität M ünster, W ilhelm -K lem m -Straße 8, D -48149 M ünster, G erm any Z. N aturforsch. 52 b, 1023 -1 0 3 0 (1997); received M ay 6, 1997 C rystal Structure, T ransition M etal A tom s Forty eight new com pounds RT2Z n 2o w ere prepared by annealing cold-pressed pellets o f the elem ental com ponents in an argon atm osphere. They crystallize with the cubic CeCr^A bo type structure (Fd3m , Z = 8), w hich was refined from single-crystal diffractom eter data o f TbFeiZn^o (a = 1411.1(1) pm ), Y R u2Z n 2o (a = 1422.6(1) pm ), D yR u2Z n 2o (a = 1422.1(1) pm ), G dC o2Z n 2o (a = 1406.0(1) pm ), D y R h2Z n 2o (a = 1418.2(1) pm ), a n d T m N i2Z n 2o (a= 1401.6(1) pm ) to conventional residuals varying betw een R = 0.011 and R -0.024. The com pounds have a tendency for tw inning, thus m im icking hexagonal sym m etry, w ith the cubic [111] axis as the axis w ith the pseudohexagonal sym m etry. M inor inconsistencies in the cell volum es o f these com pounds indicate slight deviations from the ideal com position. N evertheless, the five atom ic sites o f this structure w ere found to be fully occupied w ithin the error lim its w ith the exception o f one zinc site o f T m N i2Z n2o-The coordination for the site o f the rare earth atom s is a Frank-K asper polyhedron w ith coordination num ber (CN ) 16. The transition metal atom s occupy a site w ith icosahedral zinc coordination (CN 12). Two o f the three zinc sites are in pentagonal prism atic coordination o f zinc atom s, capped by rare earth and/or transition metal atom s (C N 12), w hile the third zinc site has 12 zinc neighbors form ing a hexagonal prism , w hich is capped by tw o rare earth atom s (C N 14).

show abstract

The rare earth rhenium aluminides Y7.28Re12Al61.38 and Ho7.32Re12Al61.48

Cited by 20 publications

References 8 publications

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

Ternary Rare Earth Metal Palladium and Platinum AluminidesR4Pd9Al24 andR4Pt9Al24

Ternary Rare Earth Transition Metal Zinc Compounds RT₂Zn₂₀ with T = Fe, Ru, Co, Rh, and Ni

Contact Info

Product

Resources

About

The rare earth rhenium aluminides Y7.28Re12Al61.38 and Ho7.32Re12Al61.48

Cited by 20 publications

References 8 publications

New Compounds RE(Zn,Al)8 and Yb4Zn20.3Al12.7 and their Crystal Structures

New Compounds RE(Zn,Al)8 and Yb4Zn20.3Al12.7 and their Crystal Structures

Ternary Rare Earth Metal Palladium and Platinum AluminidesR4Pd9Al24 andR4Pt9Al24

Ternary Rare Earth Transition Metal Zinc Compounds RT2Zn20 with T = Fe, Ru, Co, Rh, and Ni

Contact Info

Product

Resources

About

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

New Compounds RE(Zn,Al)₈ and Yb₄Zn_20.3Al_12.7 and their Crystal Structures

Ternary Rare Earth Transition Metal Zinc Compounds RT₂Zn₂₀ with T = Fe, Ru, Co, Rh, and Ni