AM_Hogtuvaite Formula: Fe5.61 Mg.12 Ti.24 Al.38 Sn.03 (Ca1.71 Na.29) Si4.56 Be1.06 O20 Name: Hogtuvaite Unit cell: 10.322 10.729 8.8624 105.802 96.185 124.758 , V=731.67 Space group: P-1 (2)

Grew E S , Barbier J , Britten J , Yates M G , Polyakov V O , Shcherbakova E P , Halenius U , Shearer C K , American Mineralogist , 90 (2005) p.1402-1412, Makarochkinite, Ca2Fe2+4Fe3+TiSi4BeAlO20, a new beryllosilicate member of the, aenigmatite-sapphirine-surinamite group from the Il men Mountains (southern, Urals), Russia, Sample: N86