AM_Stornesite-(Y) Formula: Y.677 Ca5.107 Yb.06 Na9.282 Mg31.81 Fe11.19 P36 O144 Name: Stornesite-(Y) Unit cell: 14.9628 14.9628 42.756 90.0 90.0 120.0 , V=8289.98 Space group: R11-3 (1)

Grew E S , Armbruster T , Medenbach O , Yates M G , Carson C J , American Mineralogist , 91 (2006) p.1412-1424, Stornesite-(Y), (Y, Ca)Vacancy2Na6(Ca,Na)8(Mg,Fe)43(PO4)36, the first, terrestrial Mg-dominant member of the fillowite group, from granulite-facies, paragneiss in the Larsemann Hills, Prydz Bay, East Antarctica, Locality: Larsemann Hills, Prydz Bay, East Antarctica, Note: Isostructural with chladniite