MENZERITE-(Y), A NEW SPECIES, {(Y,REE)(Ca,Fe~(2+))_2}[(Mg,Fe~(2+))(Fe~(3+),AI)](Si_3)O_(12), FROM A FELSIC GRANULITE, PARRY SOUND, ONTARIO, AND A NEW GARNET END-MEMBER, {Y_2Ca}[Mg_2](Si_3)O_(12)

摘要

Menzerite-(Y), a new mineral species, forms reddish brown cores, n = 1.844 (20), up to 70 ìm across, rimmed successively by euhedral almandine containing up to 2.7 wt% Y_2O_3 and by K-feldspar in a felsic granulite on Bonnet Island in the interior Parry Sound domain, Grenville Orogenic Province, Canada. It is named after Georg Menzer (1897-1989), the German crystallographer who solved the crystal structure of garnet. Single-crystal X-ray-diffraction results yielded space group Ia3d, a = 11.9947(6) A.