- Source: Berlinite
Berlinite (aluminium phosphate, chemical formula AlPO4 or Al(PO4)) is a rare high-temperature hydrothermal or metasomatic 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, Sweden and named for Nils Johan Berlin (1812–1891) of Lund University.
It occurs as a rare mineral in high-temperature hydrothermal or metasomatic deposits. Associated minerals include augelite, attakolite, kyanite, pyrophyllite, scorzalite, lazulite, gatumbaite, burangaite, amblygonite, phosphosiderite, purpurite, apatite, muscovite, quartz, hematite in granite pegmatites. It also occurs with alunite, aragonite, collophane, crandallite, francoanellite, gypsum, huntite, hydromagnesite, leucophosphite, nesquehonite, niter, and nitrocalcite in the Paddy's River copper mine in the Brindabella Mountains of Australia.
References
Further reading
Muraoka, Y.; Kihara, K. (1997). "The temperature dependence of the crystal structure of berlinite, a quartz-type form of AlPO4". Physics and Chemistry of Minerals. 24 (4): 243. Bibcode:1997PCM....24..243M. doi:10.1007/s002690050036. S2CID 94282170.
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