12010-46-7

Upstream product

• 7440-69-9 bismuth 
• 7440-74-6 indium 

Relevant academic research and scientific papers

Rietveld X-ray powder analysis of InBi crystalline structure at low temperatures

The dependence of the InBi crystalline structure on temperature (between 300 and 15 K) has been refined by the Rietveld method from X-ray powder diffraction data. The ranges of the lattice parameters (a and c) and the free parameter of the Bi atom (z) in the above temperature range are 5.0101(3)-4.9589(3) angstroms, 4.7824(3)-4.8396(3) angstroms and 0.3993(7)-0.3918(7) respectively.

Crystal structure of InBi under pressure up to 75 GPa

InBi is studied by energy-dispersive diffraction with synchrotron radiation in a diamond-anvil cell under pressure up to 75 GPa. Three phase transitions are observed from its initial tetragonal structure tP4 with c/a≈0.95 to another tP4 structure with c/a≈0.65 typical for the β-Np structure, than to a disordered tetragonal body-centered structure tI2, and finally some hints are obtained for a transition to a cubic body-centered structure cI2. All these transformations are reversible with large hysteresis. InBi(tI2), phase III, shows initially a steep increase in c/a from 0.91 to 0.94, in the pressure range from 20 to 30 GPa, and a nearly constant value of about 0.96 above 55 GPa. Hints for the possible stability of a new phase IV are noticed in the present experiments on decompression from 75 GPa as admixture of new lines to phase III giving strong indications for a first-order phase transition with large hysteresis. The origin of the tetragonal distortion and the transformation to a cubic phase are discussed from the point of view of nesting the Fermi sphere in the Brillouin zone.

Superconductivity and crystallographic transitions of InBi under pressure

Measurements of the superconducting transition temperature Tc of the compound InBi under pressures up to 40 GPa reveal three different regions corresponding to the observed structural transitions I-II-III from the initial phase I of InBi type (t P4) to phase II of β-Np type (t P4) and to a body-centred tetragonal phase III (t 12). Some similarities and distinct differences in the superconducting and structural behaviour of the III-V compound InBi in comparison with the isoelectronic group IV element Sn point to some differences in the possible mechanisms for the crystallographic transformations under pressure.

Supercooling of In2Bi and InBi melts

The effect of melt overheating ΔT+ on the critical supercooling ΔT- of liquid In2Bi and InBi is studied by cyclic thermal analysis. It is shown that, the ΔT- for In2Bi is ?2.0 K, independent of the me