Losing Jadar to a bout of Serbian re-sources nationalism has not dimmed Rio Tinto's lithium ambitions, nor has it ended the potential future development of what could still become Europe's biggest source of the key battery metal. Well before the Serbian Prime Minister, Ana Brnabic, last week annulled RioTinto's rights to invest US$2.4 billion in a mine producing 58,000 tonnes of lithium carbonate a year, the company was hatching a fallback plan.