Poellmannite

Where it forms, where it's found

Type locality: Hatrurim Junction (road no. 31)
Hatrurim Basin
Tamar Regional Council
Beersheba Subdistrict
Southern District
Israel
31.2019°, 35.2615°

1recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Trigonal
Space group: #80
Cell parameters: a = 9.9643(2) Å · c = 30.2212(7) Å

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 38 15.999 607.962
57.42%
20CaCalcium Calcium 6 40.078 240.468
22.71%
13AlAluminium Aluminium 3 26.982 80.946
7.64%
16SSulfur Sulfur 2 32.060 64.120
6.06%
1HHydrogen Hydrogen 42 1.008 42.336
4.00%
11NaSodium Sodium 1 22.990 22.990
2.17%
Total 1058.822 100.00%
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
8OOxygen	Oxygen	38	15.999	607.962	57.42%
20CaCalcium	Calcium	6	40.078	240.468	22.71%
13AlAluminium	Aluminium	3	26.982	80.946	7.64%
16SSulfur	Sulfur	2	32.060	64.120	6.06%
1HHydrogen	Hydrogen	42	1.008	42.336	4.00%
11NaSodium	Sodium	1	22.990	22.990	2.17%
	Total	1058.822	100.00%

Synonyms

IMA2021-109
Poellmanniet

In other languages

German: IMA 2021-109 · Poellmannit
Italian: poellmannite

Classification

Strunz

10th ed.

7.DF

7SulfatesClass
7.DSulfates (selenates, etc.) with additional anions, with H₂ODivision
7.DFWith large and medium-sized cationsGroup
7.DFPoellmanniteSpecies

Group, growth & confusion

9 members

Literature, links & citation

Citations

2022(2022) Poellmannite. Handbook of Mineralogy. Mineralogical Society of America
2022Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 66. European Journal of Mineralogy, 34 (2) 253-257 doi:10.5194/ejm-34-253-2022 DOI: 10.5194/ejm-34-253-2022

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Poellmannite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/poellmannite-55972},
  note      = {Accessed 2026-05-11}
}