AM_Pinnoite
Formula: Mg B2 O7 H6
Name: Pinnoite
Unit cell: 7.62 7.62 8.19 90.0 90.0 90.0 , V=475.55
Space group: P142/N1 (1)

Paton F , MacDonald S G G , Acta Crystallographica , 10 (1957) p.653-656, The crystal structure of pinnoite, Locality: Stassfurt, Germany