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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on PrMgPt by Materials Project

MgPrPt crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Mg is bonded in a 4-coordinate geometry to four Pt atoms. There are two shorter (2.77 Å) and two longer (2.96 Å) Mg–Pt bond lengths. Pr is bonded in a 5-coordinate geometry to five Pt atoms. There are four shorter (3.10 Å) and one longer (3.14 Å) Pr–Pt bond lengths. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 9-coordinate geometry to six equivalent Mg and three equivalent Pr atoms. In the second Pt site, Pt is bonded in a 9-coordinate geometry to three equivalent Mg and six equivalent Pr atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pr23Mg4Pt7 by Materials Project

Pr23Pt7Mg4 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded to three equivalent Mg and nine Pr atoms to form face-sharing MgPr9Mg3 cuboctahedra. All Mg–Mg bond lengths are 3.22 Å. There are a spread of Mg–Pr bond distances ranging from 3.50–3.71 Å. In the second Mg site, Mg is bonded to three Mg and nine Pr atoms to form a mixture of face and corner-sharing MgPr9Mg3 cuboctahedra. Both Mg–Mg bond lengths are 3.25 Å. There are a spread of Mg–Pr bond distances ranging from 3.49–3.75 Å. There are nine inequivalent Pr sites. In the first Pr site, Pr is bonded in a distorted bent 150 degrees geometry to two Mg and two equivalent Pt atoms. Both Pr–Pt bond lengths are 2.97 Å. In the second Pr site, Pr is bonded in a distorted T-shaped geometry to three Pt atoms. There are two shorter (3.01 Å) and one longer (3.08 Å) Pr–Pt bond lengths. In the third Pr site, Pr is bonded in a bent 150 degrees geometry to two equivalent Mg and two Pt atoms. There are one shorter (2.96 Å) and one longer (2.97 Å) Pr–Pt bond lengths. In the fourth Pr site, Pr is bonded in a 3-coordinate geometry to three Mg and three Pt atoms. There are one shorter (2.96 Å) and two longer (2.97 Å) Pr–Pt bond lengths. In the fifth Pr site, Pr is bonded in a 3-coordinate geometry to one Mg and two equivalent Pt atoms. Both Pr–Pt bond lengths are 3.74 Å. In the sixth Pr site, Pr is bonded in a 3-coordinate geometry to three equivalent Pt atoms. All Pr–Pt bond lengths are 2.99 Å. In the seventh Pr site, Pr is bonded in a distorted water-like geometry to one Mg and four Pt atoms. There are two shorter (2.92 Å) and two longer (3.66 Å) Pr–Pt bond lengths. In the eighth Pr site, Pr is bonded in a 4-coordinate geometry to two equivalent Mg and two Pt atoms. There are one shorter (3.58 Å) and one longer (3.73 Å) Pr–Pt bond lengths. In the ninth Pr site, Pr is bonded in a 3-coordinate geometry to three equivalent Mg and three equivalent Pt atoms. All Pr–Pt bond lengths are 2.97 Å. There are three inequivalent Pt sites. In the first Pt site, Pt is bonded in a 6-coordinate geometry to nine Pr atoms. In the second Pt site, Pt is bonded in a 6-coordinate geometry to eight Pr atoms. In the third Pt site, Pt is bonded in a 6-coordinate geometry to nine Pr atoms.

36 MATERIALS SCIENCE↗