Strontiopharmacosiderite

Where it forms, where it's found

Type locality: La Plâtrière quarry
Lens
Sierre
Valais
Switzerland

1recorded occurrences

Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system: Tetragonal
Space group: P-4 2m
Cell parameters: a = 8.084(27) Å · c = 8.151(5) Å

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 20 15.999 319.980
38.83%
33AsArsenic Arsenic 3 74.922 224.766
27.27%
26FeIron Iron 4 55.845 223.380
27.11%
38SrStrontium Strontium 0.5 87.620 43.810
5.32%
1HHydrogen Hydrogen 12 1.008 12.096
1.47%
Total 824.032 100.00%
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	20	15.999	319.980	38.83%
33AsArsenic	Arsenic	3	74.922	224.766	27.27%
26FeIron	Iron	4	55.845	223.380	27.11%
38SrStrontium	Strontium	0.5	87.620	43.810	5.32%
1HHydrogen	Hydrogen	12	1.008	12.096	1.47%
	Total	824.032	100.00%

Synonyms

IMA2013-101
Strontiopharmacosideriet

In other languages

German: IMA 2013-101 · Strontiopharmakosiderit
Italian: strontiopharmacosiderite

Classification

Strunz

10th ed.

8.DK.10

8Phosphates, Arsenates, VanadatesClass
8.DPhosphates, etc. with additional anions, with H₂ODivision
8.DKWith large and medium-sized cations, (OH, etc.):RO₄ > 1:1 and < 2:1Group
8.DK.10StrontiopharmacosideriteSpecies

Group, growth & confusion

7 members

Literature, links & citation

Citations

2011Ansermet, S., Meisser, N., Cuchet, S. (2011): Ein Hauch Carrara im Wallis - zur Mineralogie des Steinbruchs La Plâtrière in Lens. Schweizer Strahler 45 (2), 2-17 (in German/French).
2014Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) New minerals and nomenclature modifications approved in 2014, CNMNC Newsletter No 19. Mineralogical Magazine, 78 (1) 165-170 doi:10.1180/minmag.2014.078.1.12DOI: 10.1180/minmag.2014.078.1.12
2019Majzlan, Juraj, Haase, Patrick, Plášil, Jakub, Dachs, Edgar (2019) Synthesis and stability of some members of the pharmacosiderite group, AFe4(OH)4(AsO4)3·nH2O (A = K, Na, 0.5Ba, 0.5Sr) The Canadian Mineralogist, 57 (5) 663-675 doi:10.3749/canmin.1900035DOI: 10.3749/canmin.1900035
2022(2022) Strontiopharmacosiderite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Strontiopharmacosiderite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/strontiopharmacosiderite-41122},
  note      = {Accessed 2026-05-11}
}