Arzrunite

Pb2Cu4(SO4)(OH)4Cl6 · 2H2O
IMA status
  • Approved
  • Grandfathered
  • Questionable
IMA symbol
Arz
Also known as
  • Arzruniet
  • Arzrunitt

Where it forms, where it's found

2recorded occurrences
Source · OpenStreetMap

Safety & handling

Physical

Colour
Blue · blue-green

Optical

Optical type
Biaxial
Pleochroism
Strong

Blue and nearly colourless parallel to the horizontal axes.

Dispersion
r > v strong

Crystallography

Crystal system
Orthorhombic
Morphology

Druses of minute prismatic crystals with (110), (010), (001), and small modifying faces of (111) and (021).

Comment

Not determined

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
82PbLeadLead2207.200414.400
38.32%
29CuCopperCopper463.546254.184
23.51%
17ClChlorineChlorine635.450212.700
19.67%
8OOxygenOxygen1015.999159.990
14.79%
16SSulfurSulfur132.06032.060
2.96%
1HHydrogenHydrogen81.0088.064
0.75%
Total1081.398100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • Arzruniet
  • Arzrunitt

In other languages

German
Arzrunit
Italian
Arzrunite
Russian
Арцрунит

Classification

Strunz
10th ed.

7.DF.60

  • 7SulfatesClass
  • 7.DSulfates (selenates, etc.) with additional anions, with H2ODivision
  • 7.DFWith large and medium-sized cationsGroup
  • 7.DF.60ArzruniteSpecies
Dana
8th ed.

12.01.08.01

  • 12Compound HalidesClass
  • 12.01MiscellaneousType
  • 12.01.08— unnamed intermediate level —Group
  • 12.01.08.01ArzruniteSpecies

Literature, links & citation

Citations
  1. 1899Arzruni, A.; Thaddéeff, K. (1899) Neue Minerale aus Chile, ein neues Vorkommen von Utahit und ein neues Wismuthcarbonat von Schneeberg. Zeitschrift für Kristallographie, Mineralogie und Petrographie, 31 (1-6). 229-247 doi:10.1524/zkri.1899.31.1.229 DOI: 10.1524/zkri.1899.31.1.229
  2. 1951Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Arzrunite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/arzrunite-381},
  note      = {Accessed 2026-05-11}
}