Tapiolite

Last updated
Tapiolite
Tapiolite-121701.jpg
General
Category Minerals
Formula (Fe, Mn)(Nb, Ta)2 O 6
IMA symbol Tap [1]
Crystal system Tetragonal
Crystal class Ditetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)
Space group P42/mnm
Identification
References [2]

Tapiolite [(Fe, Mn)(Nb, Ta)2 O 6] 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. [3] [4] [5] Tapiolite-(Fe) is by far the more common of the two. [6] [7]

The minerals have a submetallic luster and a high specific gravity with tapiolite-Fe having a higher specific gravity (7.90) [6] versus 7.72 for tapiolite-Mn. [7]

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. [3] [8]

Tapiolite is very close to columbite and tantalite . Those minerals have the same chemical composition, but different crystal symmetry orthorhombic for tantalite or columbite and tetragonal for tapiolite. [9]

References

  1. ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi: 10.1180/mgm.2021.43 . S2CID   235729616.
  2. ↑ Mineralienatlas
  3. 1 2 Mindat tapiolite group
  4. ↑ Ferrotapiolite in the Handbook of Mineralogy
  5. ↑ Manganotapiolite in the Handbook of Mineralogy
  6. 1 2 Tapiolite-Fe on Mindat
  7. 1 2 Tapiolite-Mn on Mindat
  8. ↑ webmineral Tapiolite
  9. ↑ P. Cerny et al. "The tantalite-tapiolite gap: natural assemblages versus experimental data" Canadian Mineralogist 30 (1992) 587 free download


This article about a specific oxide mineral is a stub. You can help Wikipedia by expanding it.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.