Parahibbingite

Where it forms, where it's found

Late hydrothermal alteration of pyroxenite. Fine-grained reaction rims on the contact of orthopyroxene phenocrysts and talc, inside a drill core.

weathering of iron meteorites

Karee Mine

Rustenburg
Rustenburg Local Municipality
Bojanala Platinum District Municipality
North West
South Africa

-25.6714°, 27.4714°

3recorded occurrences

Source · OpenStreetMap

Physical

Colour: Light-blue grey (synthetic)
Covered by a reddish-brown rim of akageneite.
Streak: Greyish (synthetic)
Density: 3.24 g/cm³

Crystallography

Crystal system: Trigonal
Space group: R-3m
Cell parameters: a = 6.9362(4) Å · c = 14.673(1) Å
Z: 6
Type-locality form: Fine-grained coatings, reaction rims, and aggregates hosted by talc. Also as short, tiny veinlets parallel to the cleavage of cummingtonite. The maximum size of individual aggregates is 100 µm; individual grains are usually less than a few microns in diameter.

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
26FeIron Iron 2 55.845 111.690
56.36%
8OOxygen Oxygen 3 15.999 47.997
24.22%
17ClChlorine Chlorine 1 35.450 35.450
17.89%
1HHydrogen Hydrogen 3 1.008 3.024
1.53%
Total 198.161 100.00%
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
26FeIron	Iron	2	55.845	111.690	56.36%
8OOxygen	Oxygen	3	15.999	47.997	24.22%
17ClChlorine	Chlorine	1	35.450	35.450	17.89%
1HHydrogen	Hydrogen	3	1.008	3.024	1.53%
	Total	198.161	100.00%

Synonyms

IMA2020-038a
Parahibbingiet

In other languages

German: IMA 2020-038a · Parahibbingit

Classification

Strunz

10th ed.

3.DA

3HalidesClass
3.DOxyhalides, hydroxyhalides and related double halidesDivision
3.DAWith Cu, etc., without PbGroup
3.DAParahibbingiteSpecies

Group, growth & confusion

1 mineral

HibbingiteFe²⁺₂(OH)₃Cl
Mineral
—

Literature, links & citation

Citations

1964Oswald, H.R., Feitknecht, W. (1964) Über die Hydroxidhalogenide Me2(OH)3Cl, -Br, -J zweiwertiget Metalle (Me = Mg, Ni, Co, Cu, Fe, Mn). Helvetica Chimica Acta, 47, 272–289. [synthetic]
1995Buchwald, V.F., and Koch, C.B. (1995) Hibbingite (β-Fe2(OH)3Cl), a chlorine-rich corrosion product in meteorites and ancient iron objects. Meteoritics, 30(5), 493-493.
2008Rémazeilles, C., Refait, P. (2008) Formation, fast oxidation and thermodynamic data of Fe(II) hydrochlorides. Corrosion Science, 50, 856-864.
2021Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 59. European Journal of Mineralogy, 33 (1) 139-143 doi:10.5194/ejm-33-139-2021 DOI: 10.5194/ejm-33-139-2021
2022(2022) Parahibbingite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Parahibbingite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/parahibbingite-55329},
  note      = {Accessed 2026-05-11}
}