Magnesiohögbomite-6N12S
Magnesiohögbomite-6N12S is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Mg₅Al₁₁TiO₂₃(OH).
It crystallizes in the hexagonal crystal system (space group R3m). It is a member of the Hogbömite-Magnesiohogbömite structural group.
Key properties: Mohs hardness 6.5; specific gravity 3.87; Brown streak; Vitreous luster; optically uniaxial.
IMA symbol Mhög-6N12S, IMA status: approved, named in 2020.
Found in calcite “vein-dikes” cutting marble.
It is found associated with Magnesiohögbomite-2N3S, spinel, corundum, diopside, magnesio-hastingsite, pargasite, clinochlore, calcite.
Identifies a mineral with Ti dominant in the N module (rootname högbomite), Mg dominant in the S module (prefix magnesio-), and 6 and 12 as the total number of N and S modules.