Buy article online - an online subscription or single-article purchase is required to access this article.
![c logo](https://journals.iucr.org/logos/jicons/c_36x36.png)
The structure of room-temperature triclinic lithium sodium carbonate, LiNaCO3, is built up of layers; one of them contains all Na+ cations and one-third of carbonate anions and the other contains all Li+ cations with the remaining anions. The triclinic unit cell is formed by the distortion of the high-temperature hexagonal unit cell.