| abstract |
The invention relates to a solid material with the following formula (A): (Cu +1 n a-u ; Ag +1 n u ; Zn +2 n b-v-(y/2) ; Cd +2 n v ; Sn +4 n c-w-(y/2) ; 1 X +4 n w ; 2 X +3 n y ; S -2 n d-x ; Se -2 n x ) (A), in which said solid material: is in divided state in the form of particles having a mean equivalent diameter of 15 nm to 400 nm; has, according to X-ray diffraction analysis of said solid material, a unique crystalline structure; is suitable for forming a stable dispersion of at least one solid material with formula (A) in a liquid, referred to as dispersion liquid, made up of at least one compound with a value of δ p higher than 8 and a value of δ H higher than 5. |