AM_Archerite_1 Formula: K P (O4 H2) Name: Archerite Unit cell: 10.53 10.44 6.9 90.0 90.0 90.0 , V=758.54 Space group: FDD (1)

Frazer B C , Pepinsky R , Acta Crystallographica , 6 (1953) p.273-285, X-ray analysis of the ferroelectric transition in KH2PO4, Sample: at T = 116 K, Locality: synthetic, low-temperature form