Method for producing a compound comprising a pseudolaminar silicate, which is at least one clay of the palygorskite-sepiolite group, characterized in that it comprises at least the following steps: - defibrillating the microfiber bundles of the at least one clay into individualized microfibers with an average size smaller than 15 microns by means of a mechanical treatment which comprises dispersing the pseudolaminar silicate in water and wet-grinding the dispersion using a device selected from: • an impact mill or high shear dispersion equipment, in such a way that the clay is dispersed in water at a concentration ranging between 0.5% and 20%, and the grinding process is carried out at a peripheral velocity ranging between 15 m/s and 120 m/s, both limits included; or • a device selected from an intensive mixer or a turbo-mixer, in such a way that the clay is dispersed in water at a concentration ranging between 20% and 45%, at a peripheral velocity ranging between 5 m/s and 15 m/s for between 5 and 60 minutes, both limits included; - subjecting the clay to a classification process in order to separate the individualized microfibers from the microfibers aggregates which have not been completely individualized; - dispersing the individualized fibers of the defibrillated clay in an organic or inorganic liquid solvent, until a stable clay gel is formed; - adding to the dispersion at least one modifying agent of the clay surface; - removing the solvent from the clay dispersion by means of a solid-liquid separation method and/or a drying separation method; and - deagglomerating the final compound until a powdered product is obtained. - defibrillating the microfiber bundles of the at least one clay into individualized microfibers with an average size smaller than 15 microns by means of a mechanical treatment which comprises dispersing the pseudolaminar silicate in water and wet-grinding the dispersion using a device selected from: • an impact mill or high shear dispersion equipment, in such a way that the clay is dispersed in water at a concentration ranging between 0.5% and 20%, and the grinding process is carried out at a peripheral velocity ranging between 15 m/s and 120 m/s, both limits included; or • a device selected from an intensive mixer or a turbo-mixer, in such a way that the clay is dispersed in water at a concentration ranging between 20% and 45%, at a peripheral velocity ranging between 5 m/s and 15 m/s for between 5 and 60 minutes, both limits included; • an impact mill or high shear dispersion equipment, in such a way that the clay is dispersed in water at a concentration ranging between 0.5% and 20%, and the grinding process is carried out at a peripheral velocity ranging between 15 m/s and 120 m/s, both limits included; or • a device selected from an intensive mixer or a turbo-mixer, in such a way that the clay is dispersed in water at a concentration ranging between 20% and 45%, at a peripheral velocity ranging between 5 m/s and 15 m/s for between 5 and 60 minutes, both limits included; - subjecting the clay to a classification process in order to separate the individualized microfibers from the microfibers aggregates which have not been completely individualized; - dispersing the individualized fibers of the defibrillated clay in an organic or inorganic liquid solvent, until a stable clay gel is formed; - adding to the dispersion at least one modifying agent of the clay surface; - removing the solvent from the clay dispersion by means of a solid-liquid separation method and/or a drying separation method; and - deagglomerating the final compound until a powdered product is obtained.