@article{Graetsch2001, author = "Graetsch, H.A.", title = "Hexagonal high-temperature form of AlPO4 tridymite, from X-ray powder data", journal = "Acta Crystallographica, Section C: Crystal Structure Communications", year = "2001", volume = "57", pages = "665-667", ASTM_id = "ACSCEE" }