Berlinite (aluminium phosphate , chemical formula Al PO4 or Al(PO4) is a rare high-temperature hydrothermal phosphate mineral It has the same crystal structure as quartz with a low temperature polytype isostructural with α–quartz and a high temperature polytype isostructural with β–quartz. Berlinite can vary from colorless to greyish or pale pink and has translucent crystals.
It was first described in 1868 for an occurrence in the Västanå iron mine, Scania and named for Nils Johan Berlin
It occurs as a rare mineral in high-temperature hydrothermal or metasomatic Associated minerals include augelite , kyanite , lazulite , amblygonite , purpurite, hematite. It also occurs with alunite , collophane, gypsum , leucophosphite , niter in the Paddy’s River copper mine in the Brindabella Mountains of Australia