What is "svanbergite"

n. (context mineralogy English) A rhombohedral mineral with the chemical formula SrAl₃(PO₄)(SO₄)(OH)₆.

Svanbergite is a colorless, yellow or reddish mineral with the chemical formula Sr Al( P O)( SO)(O H). It has rhombohedral crystals.

It was first described for an occurrence in Varmland, Sweden in 1854 and named for Swedish chemist Lars Fredrik Svanberg (1805–1878).

It occurs in high aluminium medium-grade metamorphic rocks; in bauxite deposits and from sulfate enriched argillic alteration ( high silica and clay) associated with hydrothermal systems often replacing apatite. It occurs with pyrophyllite, kyanite, andalusite, lazulite, augelite, alunite, kaolinite and quartz.