Ramaccioniite

Where it forms, where it's found

Type locality: San Pedro mine
Jagüé
Vinchina Department
La Rioja Province
Argentina
-28.4863°, -68.6523°

1recorded occurrences

Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system: Monoclinic
Space group: P21/a
Cell parameters: a = 13.3703(3) Å · b = 9.9547(2) Å · c = 6.0412(3) Å
Cell angles: α = 90 ° · β = 103.150(3) ° · γ = 90 °
Ratio a:b:c: 1 : 0.745 : 0.452

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
29CuCopper Copper 4 63.546 254.184
50.92%
8OOxygen Oxygen 10 15.999 159.990
32.05%
34SeSelenium Selenium 1 78.971 78.971
15.82%
1HHydrogen Hydrogen 6 1.008 6.048
1.21%
Total 499.193 100.00%
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
29CuCopper	Copper	4	63.546	254.184	50.92%
8OOxygen	Oxygen	10	15.999	159.990	32.05%
34SeSelenium	Selenium	1	78.971	78.971	15.82%
1HHydrogen	Hydrogen	6	1.008	6.048	1.21%
	Total	499.193	100.00%

Synonyms

IMA2018-082
Ramaccioniiet

In other languages

German: Ramaccioniit

Classification

Strunz

10th ed.

7.BB.25

7SulfatesClass
7.BSulfates (selenates, etc.) with additional anions, without H₂ODivision
7.BBWith medium-sized cationsGroup
7.BB.25RamaccioniiteSpecies

Group, growth & confusion

1 mineral

BrochantiteCu₄(SO₄)(OH)₆
Mineral
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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) Ramaccioniite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Ramaccioniite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/ramaccioniite-53207},
  note      = {Accessed 2026-05-11}
}