Viskontite

Where it forms, where it's found

Type locality: Western paleo-fumarole field
Mountain 1004
Tolbachik Volcanic field
Milkovsky District
Kamchatka Krai
Russia
55.6718°, 160.2311°

1recorded occurrences

Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system: Orthorhombic
Space group: #34
Cell parameters: a = 20.6265(4) Å · b = 7.2040(1) Å · c = 6.5220(1) Å
Ratio a:b:c: 1 : 0.349 : 0.316

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
82PbLead Lead 5 207.200 1036.000
61.66%
8OOxygen Oxygen 21 15.999 335.979
20.00%
29CuCopper Copper 2 63.546 127.092
7.56%
16SSulfur Sulfur 3 32.060 96.180
5.72%
34SeSelenium Selenium 1 78.971 78.971
4.70%
1HHydrogen Hydrogen 6 1.008 6.048
0.36%
Total 1680.270 100.00%
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
82PbLead	Lead	5	207.200	1036.000	61.66%
8OOxygen	Oxygen	21	15.999	335.979	20.00%
29CuCopper	Copper	2	63.546	127.092	7.56%
16SSulfur	Sulfur	3	32.060	96.180	5.72%
34SeSelenium	Selenium	1	78.971	78.971	4.70%
1HHydrogen	Hydrogen	6	1.008	6.048	0.36%
	Total	1680.270	100.00%

Synonyms

Viskontiet

In other languages

German: Viskontit

Classification

Strunz

10th ed.

7.BC

7SulfatesClass
7.BSulfates (selenates, etc.) with additional anions, without H₂ODivision
7.BCWith medium-sized and large cationsGroup
7.BCViskontiteSpecies

Literature, links & citation

Citations

2023Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2023) Newsletter 74. Mineralogical Magazine, 87 (5). 783-787 doi:10.1180/mgm.2023.54DOI: 10.1180/mgm.2023.54

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Viskontite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/viskontite-470839},
  note      = {Accessed 2026-05-11}
}