AM_Archerite Formula: K P (O4 H2) Name: Archerite Unit cell: 10.48 10.48 6.9 90.0 90.0 90.0 , V=757.83 Space group: F-4D2 (122)

Frazer B C , Pepinsky R , Acta Crystallographica , 6 (1953) p.273-285, X-ray analysis of the ferroelectric transition in KH2PO4, Sample: at T = 126 K, Locality: synthetic