Materials Data on ErCoSi2 by Materials Project
ErCoSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Er is bonded in a 4-coordinate geometry to four equivalent Co and ten Si atoms. All Er–Co bond lengths are 3.04 Å. There are a spread of Er–Si bond distances ranging from 3.00–3.14 Å. Co is bonded in a 9-coordinate geometry to four equivalent Er and five Si atoms. There are a spread of Co–Si bond distances ranging from 2.21–2.31 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 12-coordinate geometry to four equivalent Er and four equivalent Co atoms. In the second Si site, Si is bonded in a 9-coordinate geometry to six equivalent Er, one Co, and two equivalent Si atoms. Both Si–Si bond lengths are 2.41 Å.
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