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Oxides & Hydroxide

Tapiolite-(Fe)

Fe²⁺Ta₂O₆
Crystal systemTetragonal
ClassOxides & Hydroxide
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Tapiolite-(Fe)

Tapiolite [(Fe, Mn)(Nb, Ta)2O6] is a black mineral series that is an ore of niobium and tantalum. The tapiolite group includes tapiolite-(Fe) or ferrotapiolite and tapiolite-(Mn) or manganotapiolite. Tapiolite-(Fe) is by far the more common of the two. The minerals have a submetallic luster and a high specific gravity with tapiolite-Fe having a higher specific gravity (7.90) versus 7.72 for tapiolite-Mn. The mineral was named in 1863 after the forest god Tapio of Finnish mythology, and the original tapiolite material came from Sukula, Tammela, Kanta-Häme, Finland.

Intro adapted from Wikipedia (CC BY-SA).

Tapiolite-(Fe) is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe²⁺Ta₂O₆.

It crystallizes in the tetragonal crystal system (space group P4_2/mnm). It is a member of the Tapiolite structural group.

IMA symbol Tap-Fe, IMA status: approved, named in 1863.

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