A process for producing a process for producing a LnM2Cu3Ox high-temperature superconductive powder, the process comprising:

i) providing an aqueous solution of Ln, M and Cu and at least one mineral acid;
ii) adding at least one sequestrating agent and, optionally, at least one dispersant to the solution to form a precipitate;
iii) recovering the precipitate from the solution; and
iv) heating the precipitate in a flow of oxygen to form the LnM2Cu3Ox powder,
wherein Ln is a rare earth element, preferably Y, Ce, Dy, Er, Gd, La, Nd, Pr, Sm, Sc, Yb, or a mixture of two or more thereof, and
wherein M is selected from Ca, Sr, and Ba.