The Road to Manono, page-1027

Agree, I was thinking more around what is required after calcination and/or is the temperature higher at the calcination stage given hydroxide has less impurities than carbonate and heat is a key to that process.

Brines go to carbonate then hydroxide, whilst hardrock is a single process (so I have assumed in the past you do the steps to carbonate for hard rock, or at least the calcination step and probably then the second step in that picture, but at what temperatures and what other additions to the process flowsheet, which I suspect might be slightly at higher temperatures, but not lower, but not sure).

All IMO