AM_Mercallite
Formula: K S (O4 H)
Name: Mercallite
Unit cell: 8.4 9.79 18.93 90.0 90.0 90.0 , V=1556.73
Space group: PBCA (61)

Loopstra L H , MacGillavry V H , Acta Crystallographica , 11 (1958) p.349-354, The crystal structure of KHSO4 (mercallite), Locality: synthetic