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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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4 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1983

Enstatite chondrites - Trace element clues to their origin

Three EH and three EL chondrites have been subjected to RNAA analysis for 20 trace elements, and interelement correlations were examined in order to assess the effects of nebular fractionation and metamorphism. The refractory siderophiles Ir, Os, and Re correlate with the normal siderophiles Ni, Pd, Au, Sb, and Ge, in ELs but not in EHs. The two element groups presumably condensed on separate phases at first, but concentrated in metal during metabolism. Volatiles are consistently more depleted in ELs than EHs. Strong correlations are found for In-Tl, Tl-Bi, and Zn-Cd-In, which are equally consistent with predicted condensation curves for the solar nebula and with volatilization curves for artificially heated Abee. The three factors accounting for 93 percent of variance reflect volatile, siderophile, and chalcophile behavior.

Hertogen, J.↗
DOE OSTI2020

Materials Data on TlIn3 by Materials Project

TlIn3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Tl is bonded to twelve In atoms to form TlIn12 cuboctahedra that share corners with six equivalent TlIn12 cuboctahedra, corners with twelve InTl4In8 cuboctahedra, edges with eighteen InTl4In8 cuboctahedra, faces with eight equivalent TlIn12 cuboctahedra, and faces with twelve InTl4In8 cuboctahedra. There are six shorter (3.41 Å) and six longer (3.52 Å) Tl–In bond lengths. There are three inequivalent In sites. In the first In site, In is bonded to four equivalent Tl and eight In atoms to form distorted InTl4In8 cuboctahedra that share corners with four equivalent TlIn12 cuboctahedra, corners with fourteen InTl4In8 cuboctahedra, edges with six equivalent TlIn12 cuboctahedra, edges with twelve InTl4In8 cuboctahedra, faces with four equivalent TlIn12 cuboctahedra, and faces with sixteen InTl4In8 cuboctahedra. There are two shorter (3.35 Å) and six longer (3.48 Å) In–In bond lengths. In the second In site, In is bonded to four equivalent Tl and eight In atoms to form distorted InTl4In8 cuboctahedra that share corners with four equivalent TlIn12 cuboctahedra, corners with fourteen InTl4In8 cuboctahedra, edges with six equivalent TlIn12 cuboctahedra, edges with twelve InTl4In8 cuboctahedra, faces with four equivalent TlIn12 cuboctahedra, and faces with sixteen InTl4In8 cuboctahedra. Both In–In bond lengths are 3.48 Å. In the third In site, In is bonded to four equivalent Tl and eight In atoms to form distorted InTl4In8 cuboctahedra that share corners with four equivalent TlIn12 cuboctahedra, corners with fourteen InTl4In8 cuboctahedra, edges with six equivalent TlIn12 cuboctahedra, edges with twelve InTl4In8 cuboctahedra, faces with four equivalent TlIn12 cuboctahedra, and faces with sixteen InTl4In8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3In by Materials Project

Tl3In is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tl is bonded to eight equivalent Tl and four equivalent In atoms to form TlTl8In4 cuboctahedra that share corners with twelve equivalent TlTl8In4 cuboctahedra, edges with eight equivalent InTl12 cuboctahedra, edges with sixteen equivalent TlTl8In4 cuboctahedra, faces with four equivalent InTl12 cuboctahedra, and faces with fourteen equivalent TlTl8In4 cuboctahedra. All Tl–Tl bond lengths are 3.49 Å. All Tl–In bond lengths are 3.49 Å. In is bonded to twelve equivalent Tl atoms to form InTl12 cuboctahedra that share corners with twelve equivalent InTl12 cuboctahedra, edges with twenty-four equivalent TlTl8In4 cuboctahedra, faces with six equivalent InTl12 cuboctahedra, and faces with twelve equivalent TlTl8In4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl3In by Materials Project

Tl3In crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Tl sites. In the first Tl site, Tl is bonded in a distorted body-centered cubic geometry to six Tl and two equivalent In atoms. There are four shorter (3.45 Å) and two longer (3.50 Å) Tl–Tl bond lengths. Both Tl–In bond lengths are 3.25 Å. In the second Tl site, Tl is bonded in a body-centered cubic geometry to eight Tl atoms. All Tl–Tl bond lengths are 3.45 Å. In is bonded in a distorted body-centered cubic geometry to four equivalent Tl atoms.

36 MATERIALS SCIENCE↗