AM_Makarochkinite Formula: Fe5.19 Mg.25 Ti.59 Nb.04 Ta.01 (Ca1.69 Na.21 Mn.1) Si4.49 Be.9 Al.54 O20 Name: Makarochkinite Unit cell: 10.355 10.751 8.873 105.757 96.227 124.861 , V=735.30 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: 400shch6