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The β-phase transforms to the α-phase at 303 °C. The γ-phase may persist to room temperature when the cooling rate is very slow, otherwise it transforms to the α-phase at 500 °C. [2] Bismuth oxide, Bi 2 O 3 has five crystallographic polymorphs. The room temperature phase, α-Bi 2 O 3 has a monoclinic crystal structure.
Pressure-temperature phase diagram of bismuth. T C refers to the superconducting transition temperature. Bismuth is a brittle metal with a dark, silver-pink hue, often with an iridescent oxide tarnish showing many colors from yellow to blue. The spiral, stair-stepped structure of bismuth crystals is the result of a higher growth rate around the ...
This is a retouched picture, which means that it has been digitally altered from its original version.Modifications: Vectorised, altered alpha to delta transition temperature from 727 to 729 degC.
This page provides supplementary chemical data on bismuth(III) oxide. Material Safety Data Sheet MSDS from Fischer Scientific ... Phase behavior Triple point? K ...
From 1986, many cuprate superconductors were identified, and can be put into three groups on a phase diagram critical temperature vs. oxygen hole content and copper hole content: lanthanum barium copper oxide (LB–CO), T C = −240 °C (35 K). yttrium barium copper oxide (YB–CO), T C = −215 °C (93 K). [4]
Pourbaix diagram of iron. [1] The Y axis corresponds to voltage potential. In electrochemistry, and more generally in solution chemistry, a Pourbaix diagram, also known as a potential/pH diagram, E H –pH diagram or a pE/pH diagram, is a plot of possible thermodynamically stable phases (i.e., at chemical equilibrium) of an aqueous electrochemical system.
The phase diagram shows, in pressure–temperature space, the lines of equilibrium or phase boundaries between the three phases of solid, liquid, and gas. The curves on the phase diagram show the points where the free energy (and other derived properties) becomes non-analytic: their derivatives with respect to the coordinates (temperature and ...
Bismuth strontium calcium copper oxide (BSCCO) is a superconducting compound family discovered in 1988. Its members exhibit the highest superconducting transition temperatures at standard pressure. [22] δ-Bismuth oxide is a solid electrolyte for oxygen. This form is stable only at high temperature, but can be electrodeposited well below this ...