from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having elements that are not combined in a definite proportion
Sorry, no etymologies found.
Cuprous sulfide, it happens, is non-stoichiometric, and corresponds to a Cu:S ratio of 1.88:1 IIRC.
"Organobismuth Chemistry" covers, through early 1999, stoichiometric compounds that contain the Bi-C bond; not included, with the exception of a few examples, are inorganic compounds, minerals, metal alloys, and non-stoichiometric materials.