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DOE OSTI2020

Materials Data on In5Bi3 by Materials Project

In5Bi3 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent In sites. In the first In site, In is bonded to six Bi atoms to form corner-sharing InBi6 octahedra. The corner-sharing octahedra tilt angles range from 0–44°. There are four shorter (3.21 Å) and two longer (3.37 Å) In–Bi bond lengths. In the second In site, In is bonded in a 5-coordinate geometry to four equivalent In and five Bi atoms. There are a spread of In–In bond distances ranging from 3.35–3.48 Å. There are a spread of In–Bi bond distances ranging from 3.31–3.42 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 10-coordinate geometry to ten In atoms. In the second Bi site, Bi is bonded in a 8-coordinate geometry to eight In atoms.

36 MATERIALS SCIENCE↗

NASA NTRS1975

Superconducting compounds and alloys research

Resistivity measurements as a function of temperature were performed on alloys of the binary material system In sub(1-x) Bi sub x for x varying between 0 and 1. It was found that for all single-phase alloys (the pure elements, alpha-In, and the three intermetallic compounds) at temperatures sufficiently above the Debye-temperature, the resistivity p can be expressed as p = a sub o T(n), where a sub o and n are composition-dependent constants. The same exponential relationship can also be applied for the sub-system In-In2Bi, when the two phases are in compositional equilibrium. Superconductivity measurements on single and two-phase alloys can be explained with respect to the phase diagram. There occur three superconducting phases (alpha-In, In2Bi, and In5Bi3) with different transition temperatures in the alloying system. The magnitude of the transition temperatures for the various intermetallic phases of In-Bi is such that the disappearance or occurrence of a phase in two component alloys can be demonstrated easily by means of superconductivity measurements.

Otto, G.↗