AM_Berlinite_4 Formula: Al P O4 Name: Berlinite Unit cell: 4.9688 4.9688 10.979 90.0 90.0 120.0 , V=234.75 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 = 275 C