Wolframoixiolite

Where it forms, where it's found

19recorded occurrences

Source · OpenStreetMap

Physical

Hardness: 1Talc
2Gypsum
3Calcite
4Fluorite
5Apatite
6Orthoclase
7Quartz
8Topaz
9Corundum
10Diamond
Lustre: Sub Metallic
Colour: Black
Streak: Brownish black

Crystallography

Crystal system: Monoclinic

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
74WTungsten Tungsten 2 183.840 367.680
30.62%
73TaTantalum Tantalum 2 180.948 361.896
30.13%
41NbNiobium Niobium 2 92.906 185.812
15.47%
26FeIron Iron 2 55.845 111.690
9.30%
25MnManganese Manganese 2 54.938 109.876
9.15%
8OOxygen Oxygen 4 15.999 63.996
5.33%
Total 1200.950 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
74WTungsten	Tungsten	2	183.840	367.680	30.62%
73TaTantalum	Tantalum	2	180.948	361.896	30.13%
41NbNiobium	Niobium	2	92.906	185.812	15.47%
26FeIron	Iron	2	55.845	111.690	9.30%
25MnManganese	Manganese	2	54.938	109.876	9.15%
8OOxygen	Oxygen	4	15.999	63.996	5.33%
	Total	1200.950	100.00%

Synonyms

Wolframixiolite
Wolframo-ixiolite
Wolframoixiolit
Wolframoixiolita
Wolframoixiolith

Literature, links & citation

Citations

—Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 98: 63-73.
1998Wise, Michael A., Černý, Petr, Falster, Alexander U. (1998) Scandium substitution in columbite-group minerals and ixiolite. The Canadian Mineralogist, 36 (2) 673-680

Cite this entry

Entry last updated August 11, 2025

@misc{mineral2025,
  author    = {Mineral Index editorial board},
  title     = {Wolframoixiolite — Mineral Index},
  year      = {2025},
  url       = {https://mineralindex.org/minerals/wolframoixiolite-7368}
}