Anhydrokainite

KMg(SO4)Cl
IMA status
  • Approved
  • Grandfathered
  • Questionable
IMA symbol
Ahk
Also known as
  • Anhydrokainiet
  • Anhydrokainita
  • Anhydrokainitt
  • +1 more

Where it forms, where it's found

Type locality
Lower Saxony
  1. Germany

Crystallography

Comment

Crystal structure not determined

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen415.99963.996
32.83%
19KPotassiumPotassium139.09839.098
20.06%
17ClChlorineChlorine135.45035.450
18.19%
16SSulfurSulfur132.06032.060
16.45%
12MgMagnesiumMagnesium124.30524.305
12.47%
Total194.909100.00%

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

From IMA formula

Synonyms

  • Anhydrokainiet
  • Anhydrokainita
  • Anhydrokainitt
  • Basaltkainit

In other languages

German
Anhydrokainit
Italian
anhydrokainite

Classification

Strunz
10th ed.

7.BC.80

  • 7SulfatesClass
  • 7.BSulfates (selenates, etc.) with additional anions, without H2ODivision
  • 7.BCWith medium-sized and large cationsGroup
  • 7.BC.80AnhydrokainiteSpecies
CIM

26.13

  • 26Sulphates with HalideClass
  • 26.13— unnamed intermediate level —Group
  • 26.13AnhydrokainiteSpecies

Literature, links & citation

Citations
  1. 1913Jänecke (1913) Kali: 7: 140.
  2. 1916Rózsa (1916) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 505. [as Basaltkainit]
  3. 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.
  4. 2022Borisov, Artem S., Siidra, Oleg I., Ugolkov, Valery L., Kuznetsov, Alexey N., Firsova, Vera A., Charkin, Dmitri O., Platonova, Natalia V., Pekov, Igor V. (2022) Complex hydrogen bonding and thermal behaviour over a wide temperature range of kainite KMg(SO4)Cl⋅2.75H2O. Mineralogical Magazine, 86 (1) 37-48 doi:10.1180/mgm.2021.101DOI: 10.1180/mgm.2021.101
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Anhydrokainite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/anhydrokainite-235},
  note      = {Accessed 2026-05-11}
}