Scandium-bearing Ixiolite (of von Knorring)

Where it forms, where it's found

Type locality: Nanro Pegmatite (Nacuissupa Pegmatite
Naquissupa Pegmatite)
Gilé District
Zambezia Province
Mozambique
-15.7833°, 38.2667°

2recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
73TaTantalum Tantalum 4 180.948 723.792
35.52%
41NbNiobium Niobium 4 92.906 371.624
18.24%
26FeIron Iron 4 55.845 223.380
10.96%
25MnManganese Manganese 4 54.938 219.752
10.78%
22TiTitanium Titanium 4 47.867 191.468
9.40%
21ScScandium Scandium 4 44.956 179.824
8.82%
8OOxygen Oxygen 8 15.999 127.992
6.28%
Total 2037.832 100.00%
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
73TaTantalum	Tantalum	4	180.948	723.792	35.52%
41NbNiobium	Niobium	4	92.906	371.624	18.24%
26FeIron	Iron	4	55.845	223.380	10.96%
25MnManganese	Manganese	4	54.938	219.752	10.78%
22TiTitanium	Titanium	4	47.867	191.468	9.40%
21ScScandium	Scandium	4	44.956	179.824	8.82%
8OOxygen	Oxygen	8	15.999	127.992	6.28%
	Total	2037.832	100.00%

Synonyms

Scandian Ixiolite (of von Knorring)

Literature, links & citation

Citations

1969v. Knorring, O.; Sahama, Th.G.; Lehtinen, M.; von Knorring, O. (1969) Scandian ixiolite from Mozambique and Madagascar. Bulletin of the Geological Society of Finland, 41. 75-77 doi:10.17741/bgsf/41.007 DOI: 10.17741/bgsf/41.007
1998Wise, Michael A., Černý, Petr, Falster, Alexander U. (1998) Scandium substitution in columbite-group minerals and ixiolite. The Canadian Mineralogist, 36 (2) 673-680
2021Lykova, Inna; Rowe, Ralph; Poirier, Glenn; McDonald, Andrew M.; Giester, Gerald (2021) Nioboheftetjernite, ScNbO₄, a new mineral from the Befanamo Pegmatite, Madagascar. The Canadian Mineralogist, 59 (2). 445-452 doi:10.3749/canmin.2000070DOI: 10.3749/canmin.2000070
2026Taddei, Alice; Holtstam, Dan; Kristiansen, Roy; Bindi, Luca (2026) Ixiolite-(Sc), (Ta0.5Sc0.5)O2, a new columbite-supergroup mineral from the Heftetjern pegmatite, Tørdal, Telemark, Norway. Mineralogical Magazine, 1-23 doi:10.1180/mgm.2026.10208DOI: 10.1180/mgm.2026.10208

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Scandium-bearing Ixiolite (of von Knorring) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/scandium-bearing-ixiolite-of-von-knorring-32091},
  note      = {Accessed 2026-05-11}
}