PROCESS FOR PREPARING TALKING COMPOSITIONS COMPRISING SILICO / GERMANO-METAL SYNTHETIC MINERAL PARTICLES

摘要

The invention relates to a process for preparing a composition, called a talcose composition, comprising synthetic silico / germano-metallic mineral particles having a crystalline and lamellar structure, and a formula (SixGe1-x) 4M3O10 (OH) 2, - M designating at least one divalent metal and having the formula Mgy (1) Coy (2) Zny (3) Cuy (4) Mny (5) Fey (6) Niy (7) Cry (8); - x being a real number of the interval [0; 1], wherein a hydrothermal treatment of a silico / germano-metallic gel of formula - (SixGe1-x) 4M3O11, nH2O - is carried out in the liquid state; the hydrothermal treatment is carried out for a duration and with a temperature of between 300 ° C. and 600 ° C., chosen according to the particle size and the structural stability desired for the silico / germano-metallic mineral particles to be prepared.