# How is the material $\ce{\alpha-NaMnO2}$ pronounced? [closed]

I am a theoretical physicist, so I am not very familiar with chemical names. The material I am interested in is $$\ce{\alpha-NaMnO2}$$. Would that be pronounced alpha sodium manganese dioxide? Is it important to say the $$\alpha$$?

If it's relevant, I'm talking about Phys. Rev. Lett. 2020, 124 (19), No. 197203.

Apologies if this is a trivial question, I tried looking up the answer, it may just be that I am not using the correct search terms.

The anions of the form $$\ce{MnO_x^y-}$$ are referred to as manganates (see Wikipedia). I'm not sure if there might be a "special" name for $$\ce{MnO2^-}$$ specifically (that's the species you have here) because I never encountered this anion in my lab times, but given that $$\ce{MnO4^2-}$$ are the "normal" manganates and $$\ce{MnO4^-}$$ the permanganates, I think manganate would be the term used here as well.
Now to distinguish the ambiguity in $$x$$ and $$y$$ you usually add the oxidation state of the central metal (in this case manganese) in the form of roman numbers. Since actually the same stoichiometric formula ($$\ce{NaMnO2}$$) could give rise to different stable crystal structures (depending on external conditions) one uses the greek letter to distinguish between these different structures. So, yes, to be precise the $$\alpha$$ is needed and I would call the compound $$\alpha$$-Sodium-manganate(III) pronounced "alpha sodium manganate three".
But in day to day conversations one would rarely use the full thing if it is clear from context. First thing usually the $$\alpha$$ is dropped and next the (III). So taking to a lab colleague, where it is clear you can just say Sodium manganate.
Update: I just saw that the materialsproject has something on your compound under ID mp-18957, where they tagged it as Sodium manganese(III) oxide.