Abstract: The invention relates to a process for obtaining senarmontite and obtained senarmontite.The invention process consists in a direct hydrolysis of antimony trichloride by means of a basic solution, the hydrolysis being carried out in the presence of an oxidizing agent.Use: Obtention of senarmontite.

Abstract: The invention relates to a process for obtaining photostable valentinite and to valentinite obtained by said process.The process consists in carrying out a basic hydrolysis of antimony trichloride at a temperature comprised between about 80.degree. and 100.degree. C. with a weight ratio of H.sub.2 O/Sb.sub.2 O.sub.3 equal to or greater than about 10.Obtention of photostable valentinite.

Abstract: A process for recovery of phosphates in ores with silico-carbonate gangue:(1) overall flotation of the ore with a collector comprising essentially a phosphoric ester in an amount and under conditions capable of causing the silicate compounds to pass into the flotation residue, and in recovering a float product containing the phosphate and carbonate compounds.(2) conditioning the float product in an acid medium for a length of time sufficient to cause the flotation of carbonates, while the phosphates constituting the valuable product desired, remain in the residue.