Precipitation of barite by myxococcus xanthus : Possible implications for the biogeochemical cycle of barium - Arias, Jose Maria.; Chekroun, Kaoutar Ben.; Fernandez-Luque, Belen.; Gonzalez-Munoz, Maria Teresa.; Linares, Concepcion de.; Martinez-Canamero, Magdalena.; Martinez-Ruiz, Francisca.; Paytan, Adina.; Rodriguez-Gallego, Manuel.