Cubic aluminum silicides RE8 Ru12Al49Si9(AlxSi12-x) (RE = Pr, Sm) from liquid aluminum. Empty (Si,Al)12 cuboctahedral clusters and assignment of the Al/Si distribution with neutron diffraction

B. Sieve, X. Z. Chen, R. Henning, P. Brazis, C. R. Kannewurf, J. A. Cowen, A. J. Schultz, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Two new quaternary aluminum silicides, RE8Ru12Al49Si9 (AlxSi12-x) (x ∼ 4; RE = Pr, Sm), have been synthesized from Sm (or SM2O3), Pr, Ru, and Si in molten aluminum between 800 and 1000 °C in sealed fused silica tubes. Both compounds form black shiny crystals that are stable in air and NaOH. The Nd analog is also stable. The compounds crystallize in a new structural type. The structure, determined by single-crystal X-ray diffraction, is cubic, space group Pm3m with Z = 1, and has lattice parameters of a = 11.510(l) Å for Sm8Ru12Al49Si9 (AlxSi12-x) and a = 11.553(2) Å for Pr8Ru12Al49Si9 (AlxSi12-x (x ∼ 4). The structure consists of octahedral units of AlSi6 at the cell center, Si2RU4Al8 clusters, at each face center, SiAl8 cubes, at the middle of the cell edges, and unique (Al,Si)12 cuboctohedral clusters, at the cell corners. These structural units are connected to each other either by shared atoms, Al - Al bonds, or Al - bonds. The rare earth metal atoms fill the space between various structural units. The Al/Si distribution was verified by single-crystal neutron diffraction studies conducted on Pr8Ru12Al49Si9 (AlxSi12-x). Sm8Ru12Al49Si9 (AlxSi12-x) and Pr8Ru12-Al49Si9 (AlxSi12-x) show ferromagnetic ordering at Tc ∼10, and ∼20 K, respectively. A charge of 3+ can be assigned to the rare earth atoms while the Ru atoms are diamagnetic.

Original languageEnglish
Pages (from-to)7040-7047
Number of pages8
JournalJournal of the American Chemical Society
Volume123
Issue number29
DOIs
Publication statusPublished - 2001

Fingerprint

Neutron Diffraction
Silicides
Neutron diffraction
Aluminum
Atoms
Liquids
Rare Earth Metals
Rare earths
Single crystals
X-Ray Diffraction
Silicon Dioxide
Fused silica
Air
Lattice constants
Molten materials
X ray diffraction
Crystals
Metals

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Cubic aluminum silicides RE8 Ru12Al49Si9(AlxSi12-x) (RE = Pr, Sm) from liquid aluminum. Empty (Si,Al)12 cuboctahedral clusters and assignment of the Al/Si distribution with neutron diffraction. / Sieve, B.; Chen, X. Z.; Henning, R.; Brazis, P.; Kannewurf, C. R.; Cowen, J. A.; Schultz, A. J.; Kanatzidis, Mercouri G.

In: Journal of the American Chemical Society, Vol. 123, No. 29, 2001, p. 7040-7047.

Research output: Contribution to journalArticle

@article{2b19e4d268d442bdaf776cdbab2cbd5d,
title = "Cubic aluminum silicides RE8 Ru12Al49Si9(AlxSi12-x) (RE = Pr, Sm) from liquid aluminum. Empty (Si,Al)12 cuboctahedral clusters and assignment of the Al/Si distribution with neutron diffraction",
abstract = "Two new quaternary aluminum silicides, RE8Ru12Al49Si9 (AlxSi12-x) (x ∼ 4; RE = Pr, Sm), have been synthesized from Sm (or SM2O3), Pr, Ru, and Si in molten aluminum between 800 and 1000 °C in sealed fused silica tubes. Both compounds form black shiny crystals that are stable in air and NaOH. The Nd analog is also stable. The compounds crystallize in a new structural type. The structure, determined by single-crystal X-ray diffraction, is cubic, space group Pm3m with Z = 1, and has lattice parameters of a = 11.510(l) {\AA} for Sm8Ru12Al49Si9 (AlxSi12-x) and a = 11.553(2) {\AA} for Pr8Ru12Al49Si9 (AlxSi12-x (x ∼ 4). The structure consists of octahedral units of AlSi6 at the cell center, Si2RU4Al8 clusters, at each face center, SiAl8 cubes, at the middle of the cell edges, and unique (Al,Si)12 cuboctohedral clusters, at the cell corners. These structural units are connected to each other either by shared atoms, Al - Al bonds, or Al - bonds. The rare earth metal atoms fill the space between various structural units. The Al/Si distribution was verified by single-crystal neutron diffraction studies conducted on Pr8Ru12Al49Si9 (AlxSi12-x). Sm8Ru12Al49Si9 (AlxSi12-x) and Pr8Ru12-Al49Si9 (AlxSi12-x) show ferromagnetic ordering at Tc ∼10, and ∼20 K, respectively. A charge of 3+ can be assigned to the rare earth atoms while the Ru atoms are diamagnetic.",
author = "B. Sieve and Chen, {X. Z.} and R. Henning and P. Brazis and Kannewurf, {C. R.} and Cowen, {J. A.} and Schultz, {A. J.} and Kanatzidis, {Mercouri G}",
year = "2001",
doi = "10.1021/ja010135k",
language = "English",
volume = "123",
pages = "7040--7047",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
number = "29",

}

TY - JOUR

T1 - Cubic aluminum silicides RE8 Ru12Al49Si9(AlxSi12-x) (RE = Pr, Sm) from liquid aluminum. Empty (Si,Al)12 cuboctahedral clusters and assignment of the Al/Si distribution with neutron diffraction

AU - Sieve, B.

AU - Chen, X. Z.

AU - Henning, R.

AU - Brazis, P.

AU - Kannewurf, C. R.

AU - Cowen, J. A.

AU - Schultz, A. J.

AU - Kanatzidis, Mercouri G

PY - 2001

Y1 - 2001

N2 - Two new quaternary aluminum silicides, RE8Ru12Al49Si9 (AlxSi12-x) (x ∼ 4; RE = Pr, Sm), have been synthesized from Sm (or SM2O3), Pr, Ru, and Si in molten aluminum between 800 and 1000 °C in sealed fused silica tubes. Both compounds form black shiny crystals that are stable in air and NaOH. The Nd analog is also stable. The compounds crystallize in a new structural type. The structure, determined by single-crystal X-ray diffraction, is cubic, space group Pm3m with Z = 1, and has lattice parameters of a = 11.510(l) Å for Sm8Ru12Al49Si9 (AlxSi12-x) and a = 11.553(2) Å for Pr8Ru12Al49Si9 (AlxSi12-x (x ∼ 4). The structure consists of octahedral units of AlSi6 at the cell center, Si2RU4Al8 clusters, at each face center, SiAl8 cubes, at the middle of the cell edges, and unique (Al,Si)12 cuboctohedral clusters, at the cell corners. These structural units are connected to each other either by shared atoms, Al - Al bonds, or Al - bonds. The rare earth metal atoms fill the space between various structural units. The Al/Si distribution was verified by single-crystal neutron diffraction studies conducted on Pr8Ru12Al49Si9 (AlxSi12-x). Sm8Ru12Al49Si9 (AlxSi12-x) and Pr8Ru12-Al49Si9 (AlxSi12-x) show ferromagnetic ordering at Tc ∼10, and ∼20 K, respectively. A charge of 3+ can be assigned to the rare earth atoms while the Ru atoms are diamagnetic.

AB - Two new quaternary aluminum silicides, RE8Ru12Al49Si9 (AlxSi12-x) (x ∼ 4; RE = Pr, Sm), have been synthesized from Sm (or SM2O3), Pr, Ru, and Si in molten aluminum between 800 and 1000 °C in sealed fused silica tubes. Both compounds form black shiny crystals that are stable in air and NaOH. The Nd analog is also stable. The compounds crystallize in a new structural type. The structure, determined by single-crystal X-ray diffraction, is cubic, space group Pm3m with Z = 1, and has lattice parameters of a = 11.510(l) Å for Sm8Ru12Al49Si9 (AlxSi12-x) and a = 11.553(2) Å for Pr8Ru12Al49Si9 (AlxSi12-x (x ∼ 4). The structure consists of octahedral units of AlSi6 at the cell center, Si2RU4Al8 clusters, at each face center, SiAl8 cubes, at the middle of the cell edges, and unique (Al,Si)12 cuboctohedral clusters, at the cell corners. These structural units are connected to each other either by shared atoms, Al - Al bonds, or Al - bonds. The rare earth metal atoms fill the space between various structural units. The Al/Si distribution was verified by single-crystal neutron diffraction studies conducted on Pr8Ru12Al49Si9 (AlxSi12-x). Sm8Ru12Al49Si9 (AlxSi12-x) and Pr8Ru12-Al49Si9 (AlxSi12-x) show ferromagnetic ordering at Tc ∼10, and ∼20 K, respectively. A charge of 3+ can be assigned to the rare earth atoms while the Ru atoms are diamagnetic.

UR - http://www.scopus.com/inward/record.url?scp=0034826472&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034826472&partnerID=8YFLogxK

U2 - 10.1021/ja010135k

DO - 10.1021/ja010135k

M3 - Article

C2 - 11459482

AN - SCOPUS:0034826472

VL - 123

SP - 7040

EP - 7047

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 29

ER -