AM_Pertsevite-(OH) Formula: Mg8 B3.112 Si1.028 O16.026 Name: Pertsevite-(OH) Unit cell: 20.494 11.89 4.588 90.0 90.0 90.0 , V=1117.97 Space group: PNMA (62)

Galuskina I O , Kadiyski M , Armbruster T , Galuskin E V , Pertsev N N , Dzierzanowski P , Wrzalik R , European Journal of Mineralogy , 20 (2008) p.951-964, A new natural phase in the system Mg2SiO4-Mg2BO3F-Mg2BO3(OH): composition,, paragenesis and structure of OH-dominant pertsevite, Locality: East Vekhoyan ye region, northern Siberia