{wiki}

Single <chemical element>, single phase (usually solid), but different 3D structures.

The prototypical examples are the <allotropes of carbon> such as <diamond> vs <graphite>.


Allotrope

{tag=Phase transition}

There are various possibilities for the axes, but some common ones:
* temperature (T) vs magnetic field strength (B)
* temperature (T) vs proportion of each <chemical element> of a <binary alloy>
* temperature (T) vs pressure

\Image[https://upload.wikimedia.org/wikipedia/commons/5/51/Phase_diagram_superconductor_type_I.svg]
{title=Sketch of the typical <superconducting phase diagram> of a <Type-I superconductor>}
{disambiguate=Superconducting phase diagram}

\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Superconductor_interactions_with_magnetic_field.png/425px-Superconductor_interactions_with_magnetic_field.png]
{title=Sketch of the typical <superconducting phase diagram> of a <Type-II superconductor>}
{disambiguate=Superconducting phase diagram}


Ciro Santilli @cirosantilli 34

 Incoming links: Chemical element