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2005
Cobalt
I 7200
30- 027
Synthesis and Characterization of Cobalt Monosilicide (CoSi) with CsCl Structure Stabilized by a β-SiC Matrix. — The title compound is prepared by reaction of
a 1:1:1 mixture of Co, Si, and graphite (1400 °C, vacuum, 4 h). CoSi (CsCl type) crystallizes in the cubic space group Pm3m with Z = 1 (Rietveld refinement of powder
XRD data). However, in the absence of graphite only the well known ε-CoSi (FeSi
type) is observed under the same reaction conditions. It is supposed that β-SiC takes an
important role in stabilizing the CoSi (CsCl type). SEM and EDX results confirm that
the CoSi is surrounded by a β-SiC matrix containing a small amount of carbon. —
(WALTER*, D.; KARYASA, I. W.; Z. Anorg. Allg. Chem. 631 (2005) 6-7, 1285-1288;
Inst. Chem., TU Berlin, D-10623 Berlin, Germany; Eng.) — Schramke
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