Ann: IONIC TECHNOLOGIES PRODUCES HIGH PURITY TERBIUM OXIDE, page-17

Congratulations to Belfast, their Chemistry set sounds as if it is almost working, they just need to get rid of the 0.045% impurities (see below)

As to the commentary, I would not get too excited, Terbium has probably peaked,

"For Vestas, a leading offshore wind turbine manufacturer, gearboxes result in five to 10 times less rare earths used per megawatt of power produced, spokesperson Claes Cunliffe told Grist in an email. In recent turbine models, Cunliffe said, the company is also phasing out the use of the heavy rare earths dysprosium and terbium. "

Source: https://grist.org/energy/offshore-wind-turbines-need-rare-earth-metals-will-there-be-enough-to-go-around/

Also notice the Specification,