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Wilkinsonite Gallery

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Wilkinsonite : Na2Fe2+4Fe3+2[O2|Si6O18]

Warrumbungle Volcano, Warrumbungle Mountains, Gowen Co., New South Wales, Australia

Small anhedral black grains of wilkinsonite, in anorthoclase / sodalite / pyroxene matrix. From the type locality.
1.5 cm field of view.
Excalibur Mineral specimen.
 © 2008, J. WeissmanPhoto ID: 149246    View Count: 153

Wilkinsonite : Na2Fe2+4Fe3+2[O2|Si6O18], Aenigmatite : Na2Fe2+5TiO2(Si6O18), Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22]

Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia

Large black laths of aenigmatite into nordmarkit-pegmatite from the northern slope of Ulyn Khuren Mt. Under microscope is visible, that primary aenigmatite of these large crystals was decay into mixture of wilkinsonite, magnetite, ilmenite, two unidentified (new?) Fe-silicates and recrystallized later aenigmatite-II. Apparently hosting pegmatite ...
 © Pavel M. KartashovPhoto ID: 142971    View Count: 193
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