Ekebergite

Where it forms, where it's found

Type locality: In den Dellen quarries
Mendig
Mendig
Mayen-Koblenz
Rhineland-Palatinate
Germany
50.3929°, 7.2845°

1recorded occurrences

Source · OpenStreetMap

Radioactivity

Crystallography

Crystal system: Monoclinic
Space group: P2/c
Cell parameters: a = 9.815(2) Å · b = 5.629(2) Å · c = 5.224(4) Å
Cell angles: β = 93.520(9) °
Ratio a:b:c: 1 : 0.574 : 0.532

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
90ThThorium Thorium 1 232.038 232.038
38.57%
41NbNiobium Niobium 2 92.906 185.812
30.88%
8OOxygen Oxygen 8 15.999 127.992
21.27%
26FeIron Iron 1 55.845 55.845
9.28%
Total 601.687 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From IMA formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
90ThThorium	Thorium	1	232.038	232.038	38.57%
41NbNiobium	Niobium	2	92.906	185.812	30.88%
8OOxygen	Oxygen	8	15.999	127.992	21.27%
26FeIron	Iron	1	55.845	55.845	9.28%
	Total	601.687	100.00%

Synonyms

Ekebergiet
IMA2018-088

In other languages

German: Ekebergit · IMA 2018-088

Classification

Strunz

10th ed.

4.DM.35

4OxidesClass
4.DMetal: Oxygen = 1:2 and similarDivision
4.DMWith large (+- medium-sized) cations; unclassifiedGroup
4.DM.35EkebergiteSpecies

Literature, links & citation

Citations

2018Hålenius, Ulf, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 46. European Journal of Mineralogy, 30 (6) 1181-1189 doi:10.1127/ejm/2018/0030-2819DOI: 10.1127/ejm/2018/0030-2819
2022(2022) Ekebergite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Ekebergite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/ekebergite-53214},
  note      = {Accessed 2026-05-11}
}