Materials Data on EuSiPt2 by Materials Project
EuPt2Si crystallizes in the orthorhombic Cmcm space group. The structure is two-dimensional and consists of two EuPt2Si sheets oriented in the (0, 1, 0) direction. Eu2+ is bonded in a 4-coordinate geometry to four equivalent Si4- atoms. All Eu–Si bond lengths are 3.26 Å. There are two inequivalent Pt1+ sites. In the first Pt1+ site, Pt1+ is bonded in a single-bond geometry to one Si4- atom. The Pt–Si bond length is 2.35 Å. In the second Pt1+ site, Pt1+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing PtSi4 tetrahedra. There are two shorter (2.46 Å) and two longer (2.50 Å) Pt–Si bond lengths. Si4- is bonded in a 9-coordinate geometry to four equivalent Eu2+ and five Pt1+ atoms.
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