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6 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2005

Status of Genesis Mo-Pt Foils

A total of 8,000 sq cm of Mo-coated Pt foils were exposed to solar wind for 884 days by the Genesis mission. Solar wind ions were captured in the surface of the Mo. Our objective is the measurement of long-lived radionuclides, such as Be-10, Al-26, Cl-36, and Mn-53, and short-lived radionuclides, such as Na-22 and Mn-54, in the captured sample of solar wind. The expected flux of these nuclides in the solar wind is 100 atom/sq cm yr or less. The hard landing of the SRC (Sample Return Capsule) at UTTR (Utah Test and Training Range) has resulted in contaminated and crumpled foils. Here we present a status report and revised plan for processing the foils.

Nishiizumi, K.↗
DOE OSTI2020

Materials Data on Mo3Pt by Materials Project

PtMo3 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Mo is bonded in a 6-coordinate geometry to two equivalent Mo and four equivalent Pt atoms. Both Mo–Mo bond lengths are 2.51 Å. All Mo–Pt bond lengths are 2.81 Å. Pt is bonded to twelve equivalent Mo atoms to form a mixture of edge and face-sharing PtMo12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MoPt3 by Materials Project

Pt3Mo1 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Mo6+ is bonded to twelve equivalent Pt2- atoms to form MoPt12 cuboctahedra that share corners with twelve equivalent MoPt12 cuboctahedra, edges with twenty-four equivalent PtMo4Pt8 cuboctahedra, faces with six equivalent MoPt12 cuboctahedra, and faces with twelve equivalent PtMo4Pt8 cuboctahedra. All Mo–Pt bond lengths are 2.81 Å. Pt2- is bonded to four equivalent Mo6+ and eight equivalent Pt2- atoms to form PtMo4Pt8 cuboctahedra that share corners with twelve equivalent PtMo4Pt8 cuboctahedra, edges with eight equivalent MoPt12 cuboctahedra, edges with sixteen equivalent PtMo4Pt8 cuboctahedra, faces with four equivalent MoPt12 cuboctahedra, and faces with fourteen equivalent PtMo4Pt8 cuboctahedra. All Pt–Pt bond lengths are 2.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MoPt2 by Materials Project

Pt2Mo crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Mo4+ is bonded in a distorted q6 geometry to ten equivalent Pt2- atoms. There are eight shorter (2.79 Å) and two longer (2.82 Å) Mo–Pt bond lengths. Pt2- is bonded to five equivalent Mo4+ and seven equivalent Pt2- atoms to form a mixture of edge, corner, and face-sharing PtMo5Pt7 cuboctahedra. There are a spread of Pt–Pt bond distances ranging from 2.75–2.83 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MoPt by Materials Project

PtMo is beta-prime cadmium gold structured and crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. Mo2+ is bonded to eight equivalent Pt2- atoms to form distorted MoPt8 hexagonal bipyramids that share corners with eighteen equivalent PtMo8Pt4 cuboctahedra, corners with eight equivalent MoPt8 hexagonal bipyramids, edges with four equivalent PtMo8Pt4 cuboctahedra, edges with twelve equivalent MoPt8 hexagonal bipyramids, faces with two equivalent PtMo8Pt4 cuboctahedra, and faces with six equivalent MoPt8 hexagonal bipyramids. There are a spread of Mo–Pt bond distances ranging from 2.77–2.85 Å. Pt2- is bonded to eight equivalent Mo2+ and four equivalent Pt2- atoms to form PtMo8Pt4 cuboctahedra that share corners with ten equivalent PtMo8Pt4 cuboctahedra, corners with eighteen equivalent MoPt8 hexagonal bipyramids, edges with six equivalent PtMo8Pt4 cuboctahedra, edges with four equivalent MoPt8 hexagonal bipyramids, faces with twelve equivalent PtMo8Pt4 cuboctahedra, and faces with two equivalent MoPt8 hexagonal bipyramids. There are two shorter (2.76 Å) and two longer (2.79 Å) Pt–Pt bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mo3Pt by Materials Project

PtMo3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Mo is bonded to eight equivalent Mo and four equivalent Pt atoms to form MoMo8Pt4 cuboctahedra that share corners with twelve equivalent MoMo8Pt4 cuboctahedra, edges with eight equivalent PtMo12 cuboctahedra, edges with sixteen equivalent MoMo8Pt4 cuboctahedra, faces with four equivalent PtMo12 cuboctahedra, and faces with fourteen equivalent MoMo8Pt4 cuboctahedra. All Mo–Mo bond lengths are 2.81 Å. All Mo–Pt bond lengths are 2.81 Å. Pt is bonded to twelve equivalent Mo atoms to form PtMo12 cuboctahedra that share corners with twelve equivalent PtMo12 cuboctahedra, edges with twenty-four equivalent MoMo8Pt4 cuboctahedra, faces with six equivalent PtMo12 cuboctahedra, and faces with twelve equivalent MoMo8Pt4 cuboctahedra.

36 MATERIALS SCIENCE↗