Pseudo phase diagram

For orientation what kind of low level metamaterials can be built with binary compounds one can create something like "pseudo phase diagrams". "pseudo" since the structure of the material at a specific point in the diagram is not defined by the thermodynamic history of the material but by the way it was mechanosynthesized. There are lots of special positions in the diagram that arise due to the specific choosen crystal structure and checkerbord pattern.

An example of such an pseudo phase diagram would be a square with CO2 (upper left) SiO2 (upper right) beta-C3N4 (lower left) Si3N4 (lower right) as their "end members". (solid CO2 is likely to be explosive but with a sufficient number of C atoms substituted with Si atoms it will be stable - it may be possible to draft a frobidden zone around the solid CO2 corner). In this specific diargam from top to bottom from oxides to nitrides the crystal structure must change significantly (due to the changing valence number) making a less continuous transition.

[todo: add existing images of such diagrams]