Raudseppite

Where it forms, where it's found

Type locality: Gun claim
Wilson Lake
Itsi Mountain
Watson Lake mining district
Yukon
Canada
62.8472°, -130.0142°

1recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Triclinic
Space group: #2
Cell parameters: a = 7.7818(4) Å · b = 7.8360(4) Å · c = 11.0318(6) Å
Cell angles: α = 100.229(1) ° · β = 92.743(1) ° · γ = 113.200(1) °
Ratio a:b:c: 1 : 1.007 : 1.418

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 24 15.999 383.976
31.93%
20CaCalcium Calcium 7 40.078 280.546
23.33%
56BaBarium Barium 2 137.327 274.654
22.84%
14SiSilicon Silicon 6 28.085 168.510
14.01%
17ClChlorine Chlorine 2 35.450 70.900
5.89%
6CCarbon Carbon 2 12.011 24.022
2.00%
Total 1202.608 100.00%
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
8OOxygen	Oxygen	24	15.999	383.976	31.93%
20CaCalcium	Calcium	7	40.078	280.546	23.33%
56BaBarium	Barium	2	137.327	274.654	22.84%
14SiSilicon	Silicon	6	28.085	168.510	14.01%
17ClChlorine	Chlorine	2	35.450	70.900	5.89%
6CCarbon	Carbon	2	12.011	24.022	2.00%
	Total	1202.608	100.00%

Synonyms

IMA2025-070
Raudseppiet

In other languages

Catalan: raudseppita

Classification

Strunz

10th ed.

9.CA

9SilicatesClass
9.CCyclosilicatesDivision
9.CA[Si₃O₉]₆- 3-membered single rings (dreier-Einfachringe), without insular complex anionsGroup
9.CARaudseppiteSpecies

Literature, links & citation

Citations

—Macquistan, M., Groat, L.A., Lykova, I., Peterson, R.C. and Rowe, R. (2026) Raudseppite, IMA 2025-070. CNMNC Newsletter 89, Mineralogical Magazine, 90, https://doi.org/10.1180/mgm.2026.10199

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Raudseppite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/raudseppite-499350},
  note      = {Accessed 2026-05-11}
}