I downloaded a few structures from the database about a year and a half ago, and this week I re-downloaded the same structures again. I’ve noticed that several structures that used to have small band gaps are now metallic – same MPID, same phase, same energy above the hull.
One example is the material LiMgP, mp-10178. My old copy of the database reports a band gap of 217 meV; currently it says it is metallic. Can you confirm that this data has changed recently (and that it wasn’t just a bug on my end), and provide the justification for why? I am now worried that the electronic structure data is not rigorously calculated or trustworthy.