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Oxides & Hydroxide

Hydroxymanganopyrochlore

(Mn,Th,Na,Ca,REE)₂(Nb,Ti)₂O₆(OH)
Crystal systemCubic
ClassOxides & Hydroxide
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Hydroxymanganopyrochlore specimen

Photo enhanced by AI — Photo: Mineralogist · Public Domain

Hydroxymanganopyrochlore

Hydroxymanganopyrochlore is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Mn,Th,Na,Ca,REE)₂(Nb,Ti)₂O₆(OH).

It crystallizes in the cubic crystal system (space group Fd-3m). It is a member of the Pyrochlore-Pyrochlore structural group.

Key properties: specific gravity 5.398.

IMA symbol Hmpcl, IMA status: approved, named in 2012.

Found in small miarolitic cavities in sanidinite as a late pneumatolytic phase.

It is found associated with Sanidine, nosean, biotite, tephroite, jacobsite, and spinellides of the gahnite–hercynite series.

Reflects the mineral’s identity as a member of the pyrochlore group with dominant OH (hydroxyl) and Mn2+ respectively in the Y and A structural sites.

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 H minerals or help write this entry.