beta-vredenburgite
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vredenburgite — ˈvredənˌbərˌgīt noun ( s) Etymology: Vredenburg, Alabama + English ite 1. : a mineral consisting of an oriented intergrowth of jacobsite and hausmannite called also beta vredenburgite 2. : a homogeneous mineral (Mn,Fe)3O4 that has the sam … Useful english dictionary