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Silicate

Mangani-pargasite

NaCa₂(Mg₄Mn³⁺)(Si₆Al₂)O₂₂(OH)₂
Hardness5–6
Crystal systemMonoclinic
ClassSilicate
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Mangani-pargasite

Mangani-pargasite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaCa₂(Mg₄Mn³⁺)(Si₆Al₂)O₂₂(OH)₂.

It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.

Key properties: Mohs hardness 5–6; specific gravity 3.127; Vitreous luster; optically biaxial.

IMA symbol Mprg, IMA status: approved, named in 2019.

Found in a regionally metamorphosed, submarine, volcanogenic Fe-Mn oxide deposit in silicate-impregnated, calcitic carbonate rock.

It is found associated with Hausmannite, arsenate-substituted apatite, hedyphane, kentrolite, forsterite, manganoan phlogopite, calcite.

Prefix identifies a pargasite analog with Mn3+ dominant among the trivalent C cations.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more M minerals or help write this entry.