The testwork, which targeted pollucite concentrate grading 12% Cs2O, successfully isolated caesium while effectively managing impurities such as aluminum. Beyond primary extraction, researchers identified a secondary opportunity to recover rubidium as a by-product, a prospect the company intends to investigate in subsequent phases. Parallel to the conventional sulphuric acid approach, PMET is collaborating with Koch Technology Solutions to evaluate a proprietary flowsheet designed for high-selectivity caesium recovery.
These technical programs are part of a broader strategy to unlock the economic potential of the Shaakichiuwaanaan property, which hosts one of the world’s largest pollucite-hosted caesium deposits. PMET plans to move into a proof-of-concept phase, aiming to produce gram-scale samples of high-purity caesium sulphate, carbonate, and formate by the end of 2026. These results will feed into a Preliminary Economic Assessment for the project, scheduled for completion in Q4 2026 alongside a feasibility study focused on the site's lithium assets.
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