sialon

https://doi.org/10.1351/goldbook.ST06754
A generic name for compounds or solid solutions in the system M–Si–Al–O–N where M is a metal. (The use of capitals as in SiAlON is discouraged since they suggest a chemical composition.)
Source:
PAC, 1999, 71, 1765. (Terminology for compounds in the Si-Al-O-N system) on page 1767 [Terms] [Paper]