Pilbara Minerals’ fourth spodumene concentrate auction saw 5,000 mt spodumene concentrate with 5.5% lithium oxide, loading between June 15 and July 15, sold at $5,650/dmt on an FOB Port Hedland basis on April 27, equivalent to $6,163.6/dmt for 6% lithium oxide. The freight rate to China was $90/dmt. General expectations had been for a price in a $5,000-6,000/mt range, sources…