Ordered CoSn-type ternary phases in Co 3Sn 3-xGe x

J. M. Allred; Shuang Jia; M. Bremholm; B. C. Chan; R. J. Cava

doi:10.1016/j.jallcom.2012.04.045

Ordered CoSn-type ternary phases in Co ₃Sn _3-xGe _x

J. M. Allred, Shuang Jia, M. Bremholm, B. C. Chan, R. J. Cava

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

CoSn is the prototype compound of the B35 structure, which has long been of interest due to its rarity and unusually low packing density. We report the synthesis and properties of the solid solution Co ₃Sn _3-xGe _x for 0 ≤ x ≤ 2, in order to clarify the conditions necessary to stabilize such a phase. By taking advantage of the chemical differences between the two crystallographically inequivalent Sn sites in the structure, we observe ordered ternary phases, nominally Co ₃SnGe ₂ and Co ₃Sn ₂Ge. The electron count and unit cell configuration remain unchanged from CoSn; these observations thus help to clarify some ambiguities about the stabilizing forces in this crystal structure. All compounds are normal metals with room temperature conductivities ranging from 5 to 50 μΩ cm and are weakly paramagnetic.

Original language	English (US)
Pages (from-to)	137-143
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	539
DOIs	https://doi.org/10.1016/j.jallcom.2012.04.045
State	Published - Oct 25 2012

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Keywords

Crystal growth
Crystal structure
Electronic properties
Intermetallics
Preferential site ordering
X-ray diffraction

Access to Document

10.1016/j.jallcom.2012.04.045

Cite this

@article{84fca8e5cc9141058351fc255547c0aa,

title = "Ordered CoSn-type ternary phases in Co 3Sn 3-xGe x ",

abstract = "CoSn is the prototype compound of the B35 structure, which has long been of interest due to its rarity and unusually low packing density. We report the synthesis and properties of the solid solution Co 3Sn 3-xGe x for 0 ≤ x ≤ 2, in order to clarify the conditions necessary to stabilize such a phase. By taking advantage of the chemical differences between the two crystallographically inequivalent Sn sites in the structure, we observe ordered ternary phases, nominally Co 3SnGe 2 and Co 3Sn 2Ge. The electron count and unit cell configuration remain unchanged from CoSn; these observations thus help to clarify some ambiguities about the stabilizing forces in this crystal structure. All compounds are normal metals with room temperature conductivities ranging from 5 to 50 μΩ cm and are weakly paramagnetic.",

keywords = "Crystal growth, Crystal structure, Electronic properties, Intermetallics, Preferential site ordering, X-ray diffraction",

author = "Allred, {J. M.} and Shuang Jia and M. Bremholm and Chan, {B. C.} and Cava, {R. J.}",

note = "Funding Information: J.M. Allred would like to thank Dr. N. Ni and Dr. S.E. Dutton for helpful discussions. The structural aspects of this research were supported by the NSF program in solid state chemistry, Grant NSF-DMR-1005438, and portions of the X-ray crystallography were supported by the NSF Major Research Instrumentation grant #0922931. The property characterization was supported by the DOE solid state chemistry program Grant DE-FG02-98ER-45706. ",

year = "2012",

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doi = "10.1016/j.jallcom.2012.04.045",

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T1 - Ordered CoSn-type ternary phases in Co 3Sn 3-xGe x

AU - Allred, J. M.

AU - Jia, Shuang

AU - Bremholm, M.

AU - Chan, B. C.

AU - Cava, R. J.

N1 - Funding Information: J.M. Allred would like to thank Dr. N. Ni and Dr. S.E. Dutton for helpful discussions. The structural aspects of this research were supported by the NSF program in solid state chemistry, Grant NSF-DMR-1005438, and portions of the X-ray crystallography were supported by the NSF Major Research Instrumentation grant #0922931. The property characterization was supported by the DOE solid state chemistry program Grant DE-FG02-98ER-45706.

PY - 2012/10/25

Y1 - 2012/10/25

N2 - CoSn is the prototype compound of the B35 structure, which has long been of interest due to its rarity and unusually low packing density. We report the synthesis and properties of the solid solution Co 3Sn 3-xGe x for 0 ≤ x ≤ 2, in order to clarify the conditions necessary to stabilize such a phase. By taking advantage of the chemical differences between the two crystallographically inequivalent Sn sites in the structure, we observe ordered ternary phases, nominally Co 3SnGe 2 and Co 3Sn 2Ge. The electron count and unit cell configuration remain unchanged from CoSn; these observations thus help to clarify some ambiguities about the stabilizing forces in this crystal structure. All compounds are normal metals with room temperature conductivities ranging from 5 to 50 μΩ cm and are weakly paramagnetic.

AB - CoSn is the prototype compound of the B35 structure, which has long been of interest due to its rarity and unusually low packing density. We report the synthesis and properties of the solid solution Co 3Sn 3-xGe x for 0 ≤ x ≤ 2, in order to clarify the conditions necessary to stabilize such a phase. By taking advantage of the chemical differences between the two crystallographically inequivalent Sn sites in the structure, we observe ordered ternary phases, nominally Co 3SnGe 2 and Co 3Sn 2Ge. The electron count and unit cell configuration remain unchanged from CoSn; these observations thus help to clarify some ambiguities about the stabilizing forces in this crystal structure. All compounds are normal metals with room temperature conductivities ranging from 5 to 50 μΩ cm and are weakly paramagnetic.

KW - Crystal growth

KW - Crystal structure

KW - Electronic properties

KW - Intermetallics

KW - Preferential site ordering

KW - X-ray diffraction

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