Bennesherite
Bennesherite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ba₂Fe²⁺Si₂O₇.
It crystallizes in the tetragonal crystal system (space group P-42_1m). It is a member of the Melilite structural group.
Key properties: Mohs hardness 5; specific gravity 4.27; White streak; Vitreous luster; optically uniaxial.
IMA symbol Bnh, IMA status: approved, named in 2019.
Found in intergranular spaces in thin veins of rankinite paralava within pyrometamorphic gehlenite hornfels.
It is found associated with Rankinite, gehlenite, garnet, fresnoite, walstromite, zadovite, gurimite, hexacelsian, celsian.
The name refers to Ben Nesher Mount, near where the mineral was first collected.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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