de la Cour has written for various ensembles and soloists across the UK, the US and Europe including Michael Finnissy, Ah! you sitting comfortably (Vicky Wright/Peter Willcock), Laura Moody, Mark Knoop, The Calculators, Arco Collective, Anne Rhodes, Matthew Knowles, Libra Duo (Mark Knoop/Carl Rosman), IXION Ensemble.
The name is for Ixion, the Greek mythological character related to Tantalus, as the mineral contains tantalum.
His works have been performed and broadcast by ensembles and artists such as rout, 175 East, Arditti Quartet, Asko Ensemble, BBC Symphony Orchestra, Richard Casey, Composers Ensemble, Exquisite Corpse, Philip Howard, Huuj Ensemble, Ives Ensemble, Ixion, Jane's Minstrels, London Sinfonietta, Opus 20 and the London Symphony Orchestra.