Centre National De La Recherche Scientifique

Université Paul Sabatier (Toulouse III)

Centre National De La Recherche Scientifique-cnrs

Marie Claverie

Cyril Aymonier

Pierre Micoud

Christophe Le Roux

François Martin

The invention relates to a method for preparing synthetic mineral particles with formula (AlM)(SiGe)O(OH), wherein M designates at least one trivalent metal selected from the group made up of gallium and the rare earths, which comprises the following steps: preparing a gel which is a precursor of said synthetic mineral particles by a co-precipitation reaction of at least one salt of metal selected among aluminium and M with at least one silicon source selected from the group made up of potassium metasilicate, sodium metasilicate, potassium metagermanate and sodium metagermanate, the molar ratio of (AlM) to (SiGe) during the preparation of said precursor gel being equal to 1, at least one base being added during said co-precipitation reaction; and performing a solvothermal treatment of said precursor gel at a temperature of 250&#xb0; C. to 600&#xb0; C.

Method for preparing synthetic mineral particles

The invention relates to a mineral compound, referred to as synthetic mica, with formula A(Si-Ge)MO(OH), wherein: A designates at least one monovalent interfoliar cation of a metal element, A having the formula LiNaKRbCs, each instance of w(i) representing a real number in the interval [0; 1], such that the sum of the instances of w(i) is equal to 1; t is a real number in the interval [0.3; 1]; x is a real number in the interval [0; 1]; M designates at least one divalent metal having the formula MgCoZnCuMnFeNiCr, each instance of y(i) representing a real number in the interval [0; 1], such as the formula (A); and z is a real number in the interval [2.50; 2.85]. The invention also relates to a composition comprising such a compound and a method for preparing such a compound. 

Synthetic mineral compound, composition including such a compound and method for manufacturing such a compound

Growing community of inventors

Hossegor, France

Marie Claverie