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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuAsPt by Materials Project

EuPtAs is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. Eu3+ is bonded to six equivalent Pt2- and six equivalent As1- atoms to form a mixture of edge and face-sharing EuAs6Pt6 cuboctahedra. There are four shorter (3.26 Å) and two longer (3.30 Å) Eu–Pt bond lengths. There are four shorter (3.25 Å) and two longer (3.32 Å) Eu–As bond lengths. Pt2- is bonded in a 9-coordinate geometry to six equivalent Eu3+ and three equivalent As1- atoms. All Pt–As bond lengths are 2.49 Å. As1- is bonded in a 9-coordinate geometry to six equivalent Eu3+ and three equivalent Pt2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu(AsPt)2 by Materials Project

EuPt2As2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Eu2+ is bonded in a 8-coordinate geometry to eight Pt2- atoms. There are four shorter (3.38 Å) and four longer (3.43 Å) Eu–Pt bond lengths. There are two inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded in a 8-coordinate geometry to four equivalent Eu2+ and four equivalent As1+ atoms. All Pt–As bond lengths are 2.61 Å. In the second Pt2- site, Pt2- is bonded in a 5-coordinate geometry to four equivalent Eu2+ and five As1+ atoms. There are one shorter (2.49 Å) and four longer (2.55 Å) Pt–As bond lengths. There are two inequivalent As1+ sites. In the first As1+ site, As1+ is bonded to four equivalent Pt2- atoms to form a mixture of edge and corner-sharing AsPt4 tetrahedra. In the second As1+ site, As1+ is bonded in a 5-coordinate geometry to five Pt2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2As3Pt by Materials Project

Eu2PtAs3 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Eu+2.50+ is bonded in a distorted q4 geometry to nine As3- atoms. There are a spread of Eu–As bond distances ranging from 3.28–3.37 Å. Pt4+ is bonded in a trigonal planar geometry to three equivalent As3- atoms. All Pt–As bond lengths are 2.56 Å. There are three inequivalent As3- sites. In the first As3- site, As3- is bonded in a 9-coordinate geometry to six equivalent Eu+2.50+ and three equivalent As3- atoms. There are one shorter (2.54 Å) and two longer (2.56 Å) As–As bond lengths. In the second As3- site, As3- is bonded in a 9-coordinate geometry to six equivalent Eu+2.50+ and three equivalent Pt4+ atoms. In the third As3- site, As3- is bonded in a 9-coordinate geometry to six equivalent Eu+2.50+ and three equivalent As3- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2(AsPt)3 by Materials Project

Eu2(PtAs)3 crystallizes in the tetragonal P4/mmm space group. The structure is one-dimensional and consists of one Eu2(PtAs)3 ribbon oriented in the (0, 0, 1) direction. Eu+2.50+ is bonded in a linear geometry to one Pt+1.33+ and one As3- atom. The Eu–Pt bond length is 2.62 Å. The Eu–As bond length is 2.91 Å. There are two inequivalent Pt+1.33+ sites. In the first Pt+1.33+ site, Pt+1.33+ is bonded in a linear geometry to one Eu+2.50+ and one As3- atom. The Pt–As bond length is 2.32 Å. In the second Pt+1.33+ site, Pt+1.33+ is bonded in a linear geometry to two equivalent As3- atoms. Both Pt–As bond lengths are 2.25 Å. There are two inequivalent As3- sites. In the first As3- site, As3- is bonded in a linear geometry to two equivalent Pt+1.33+ atoms. In the second As3- site, As3- is bonded in a linear geometry to one Eu+2.50+ and one Pt+1.33+ atom.

36 MATERIALS SCIENCE↗