AM_Berlinite_3 Formula: Al P O4 Name: Berlinite Unit cell: 4.958 4.958 10.967 90.0 90.0 120.0 , V=233.47 Space group: P3221 (154)

Muraoka Y , Kihara K , Physics and Chemistry of Minerals , 24 (1997) p.243-253, The temperature dependence of the crystal structure of berlinite,, a quartz-type form of AlPO4, Sample: T = 183 C