Yttrotungstite-(Nd)

Where it forms, where it's found

Type locality: Nyakabingo Mine
Rulindo District
Northern Province
Rwanda
-1.8633°, 29.9775°

2recorded occurrences

Source · OpenStreetMap

Physical

Colour: Greenish yellow · brown-orange
The material form the Clara mine is brown-orange (Kolitsch et al., 2004).

Crystallography

Crystal system: Monoclinic
Space group: P21/m
Cell parameters: a = 5.8534(3) Å · b = 8.6881(3) Å · c = 7.0488(4) Å
Cell angles: β = 105.336(5) °
Ratio a:b:c: 1 : 1.484 : 1.204

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
55.80%
60NdNeodymium Neodymium 1 144.242 144.242
21.89%
8OOxygen Oxygen 9 15.999 143.991
21.85%
1HHydrogen Hydrogen 3 1.008 3.024
0.46%
Total 658.937 100.00%
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	55.80%
60NdNeodymium	Neodymium	1	144.242	144.242	21.89%
8OOxygen	Oxygen	9	15.999	143.991	21.85%
1HHydrogen	Hydrogen	3	1.008	3.024	0.46%
	Total	658.937	100.00%

Synonyms

Unnamed (Nd-analogue of Yttrotungstite-(Ce))
Yttrotungstiet-(Nd)

In other languages

German: IMA 2023-064 · Yttrotungstit-(Nd)

Classification

Strunz

10th ed.

4.FM

4OxidesClass
4.FHydroxides (without V or U)Division
4.FMHydroxides with H₂O +- (OH); unclassifiedGroup
4.FMYttrotungstite-(Nd)Species

Literature, links & citation

Citations

2004Kolitsch, Uwe; Blaß, Günter; Graf, Hans-Werner; Gröbner, Joachim (2004) Neufunde aus der Grube Clara im mittleren Schwarzwald [New finds from the Clara mine in the central Black Forest]. Lapis, 29 (2). 18-23; 50
2023Bosi, Ferdinando, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2023) Newsletter 76. Mineralogical Magazine, 1-5 doi:10.1180/mgm.2023.89 DOI: 10.1180/mgm.2023.89

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Yttrotungstite-(Nd) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/yttrotungstite-nd-470937},
  note      = {Accessed 2026-05-11}
}