AM_Ahlfeldite
Formula: Ni Se O5 H4
Name: Ahlfeldite
Unit cell: 6.441 8.746 7.522 90.0 99.0 90.0 , V=418.52
Space group: P121/N1 (14)

Wildner M , Neues Jahrbuch fur Mineralogie, Monatshefte , 1990 (1990) p.353-362, Crystal structure refinements of synthetic cobaltomenite (CoSeO3*2H2O), and ahlfeldite (NiSeO3*2H2O)