Barca have also been linked with a move for Antoine Griezmann, but that is likely to come in the summer. The 23-year-old becomes Barcelona's second signing of the January transfer window, after finally completing a €120 million move for Liverpool star Philippe Coutinho.
Having started out at Deportivo Pasto at the age of 19, Mina got his big break at Independiente Santa Fe before leaving his native Colombia and heading to Brazil with Palmeiras in 2016.
"We will shortly inform you of the agenda and the presentation time of the player". The Colombian had nine goals in 49 games for the Brazilian squad. In fact, in his first season with the Brazilian team he was chosen as the best centre back of the Campeonato Paulista in 2017.
Palmeiras have allowed the Colombia defender to travel for talks with the La Liga giants.
Barcelona have now confirmed an agreement is in place.
Part of the transfer fee will go to his former clubs in Colombia.
And while Mina'a arrival is expected to be the last of the month yesterday it emerged Ernesto Valverde was still looking at another defender.