May 2 (Reuters) - Rare earths miner MP Materials reported wider-than-expected loss in first-quarter on Thursday, hurt by lower concentrate sales and eakness in pricing of rare earth products.

The company reported adjusted loss of 4 cents per share, compared with analysts' expectations of a loss of 2 cents per share.

(Reporting by Mrinalika Roy in Bengaluru; Editing by Alan Barona)