Erikapohlite

(◻0.5Cu0.5)CuCaZn2(AsO4)3 · H2O
IMA status
  • Approved
IMA symbol
Erk
IMA approved
2010
Also known as
  • Erikapohliet
  • IMA2010-090
  • Mineral GS5 (of Gebhard)

Where it forms, where it's found

Type locality
Tsumeb Mine (Ongopolo Mine)
  1. Tsumeb
  2. Oshikoto Region
  3. Namibia

-19.2270°, 17.7276°

1recorded occurrences
Source · OpenStreetMap

Safety & handling

Physical

Colour
Deep blue

Crystallography

Crystal system
Monoclinic
Space group
C2/m
Cell parameters
a = 12.6562(8) Å · b = 12.727(1) Å · c = 6.9146(4) Å
Cell angles
β = 113.923(5) °
Ratio a:b:c
1 : 1.006 : 0.546
Crystal structure

Synonyms

  • Erikapohliet
  • IMA2010-090
  • Mineral GS5 (of Gebhard)

In other languages

German
Erikapohlit · IMA 2010-090
Italian
erikapohlite

Classification

Strunz
10th ed.

8.AC.05

  • 8Phosphates, Arsenates, VanadatesClass
  • 8.APhosphates, etc. without additional anions, without H2ODivision
  • 8.ACWith medium-sized and large cationsGroup
  • 8.AC.05ErikapohliteSpecies

Group, growth & confusion

In the same group
26 members
Commonly confused with
1 mineral

Literature, links & citation

Citations
  1. —Grossenseifen, Germany, p. 320. [as "GS 5"]
  2. 1999Gebhard, Georg (1999) Tsumeb Vol. 2 - A Unique Mineral Locality - Tsumeb. GG Publishing. p.1-328.
  3. 2011Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011. CNMNC Newsletter No 9. Mineralogical Magazine, 75 (4) 2535-2540 doi:10.1180/minmag.2011.075.4.2535 DOI: 10.1180/minmag.2011.075.4.2535
  4. 2013Schlüter, Jochen, Malcherek, Thomas, Mihailova, Boriana, Gebhard, Georg (2013) The new mineral erikapohlite, Cu3(Zn,Cu,Mg)4Ca2(AsO4)6 · 2H2O, the Ca-dominant analogue of keyite, from Tsumeb, Namibia. Neues Jahrbuch für Mineralogie - Abhandlungen, 190 (3) 319-325 doi:10.1127/0077-7757/2013/0239DOI: 10.1127/0077-7757/2013/0239
  5. 2016(2016) Erikapohlite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Erikapohlite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/erikapohlite-43323},
  note      = {Accessed 2026-05-11}
}