The type locality (the place where the mineral was first described) is La Chaux de Bergonne, Gignat, Saint-Germain-Lembron, Puy-de-Dôme, Auvergne, France, and type material from this locality is held at the Natural History Museum, London, England, registration number BM.1930,166.
2H occurs in carbonatite at Jacupiranga, São Paulo, Brazil, in the Jacupiranga mine and 3T occurs with minerals like gonnardite and donnayite.