Where it forms, where it's found
- Geological setting
Fumarole
- Type locality
- Arsenatnaya fumarole
- Second scoria cone
- Northern Breakthrough (North Breach)
- Great Fissure eruption (Main Fracture)
- Tolbachik Volcanic field
- Milkovsky District
- Kamchatka Krai
- Russia
55.6833°, 160.2333°
1recorded occurrences
Safety & handling
Physical
- Transparency
- Translucent
- Colour
- Black
- Density
- 3.790 g/cm³
Optical
- Optical type
- Biaxial (-) · 2V measured = 60°
- Refractive index
- 1.646 – 1.734
- Surface relief
- High
- Principal indices
- nα 1.646 · nβ 1.715 · nγ 1.734
Δ = 0Δmax
PPLpleochroism per grain
XPLindependent extinctions · rotate the stage
PPLpleochroism only · colour blends on rotation
XPLinterference colour · extinct every 90°
Retardation880 nm
Order2nd order
XPL colour
Crystallography
- Cell parameters
- a = 9.3986(3) Å · b = 4.8911(1) Å · c = 18.2293(5) Å
- Cell angles
- β = 104.409(3) °
- Ratio a:b:c
- 1 : 0.520 : 1.940
- Type-locality form
Interrupted crusts up to 6 mm across and up to 0.3 mm thick consisting of equant, prismatic, or tabular crystals or grains up to 0.3 mm.
- Comment
P21/n
Chemical composition
Synonyms
- Eleomelaniet
- IMA2015-118
In other languages
- German
- Eleomelanit · IMA 2015-118
Classification
Strunz
10th ed.7.BC.52
- 7SulfatesClass
- 7.BSulfates (selenates, etc.) with additional anions, without H2ODivision
- 7.BCWith medium-sized and large cationsGroup
- 7.BC.52EleomelaniteSpecies
Literature, links & citation
Citations
- 2016(2016)
- 2016Hålenius, U., Hatert, F., Pasero, M., Mills, S.J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter no 30. Mineralogical Magazine, 80 (2) 407-413 doi:10.1180/minmag.2016.080.081DOI: 10.1180/minmag.2016.080.081
- 2020Pekov, Igor V., Zubkova, Natalia V., Agakhanov, Atali A., Chukanov, Nikita V., Belakovskiy, Dmitry I., Sidorov, Evgeny G., Britvin, Sergey N., Turchkova, Anna G., Pushcharovsky, Dmitry Yu. (2020) Eleomelanite, (K2Pb)Cu4O2(SO4)4, a new mineral species from the Tolbachik Volcano, Kamchatka, Russia. The Canadian Mineralogist, 58 (5) 625-636 doi:10.3749/canmin.2000032DOI: 10.3749/canmin.2000032
- 2022(2022) Eleomelanite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Eleomelanite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/eleomelanite-47609},
note = {Accessed 2026-05-11}
}