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FILE PHOTO: Sigma Lithium Corp SGML.V production at the Grota FILE PHOTO: View shows Sigma Lithium Corp SGML.V production at the Grota do Cirilo mine in Itinga, in Minas Gerais state, Brazil April 18, 2023. REUTERS/Washington Alves/File Photo Post navigation Previous: Exclusive-Brazil mineral rights dispute casts shadow on Sigma Lithium expansion