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Haggertyite: Ba[Fe++6Ti5Mg]O19
Comments: Backscattered electron photomicrograph showing a hexagonal haggertyite crystal (white) in contact with richterite (light gray) and serpentized olivine (dark gray). (AmMin, v 83, p 1324). Location: Prairie Creek lamproite, Arkansas, USA. Scale: See Image. © American Mineralogist