Paulgrothite

Where it forms, where it's found

Type locality: Arsenatnaya fumarole
Second scoria cone
Northern Breakthrough (North Breach)
Great Fissure eruption (Main Fracture)
Tolbachik Volcanic field
Milkovsky District
Kamchatka Krai
Russia
55.6833°, 160.2333°

1recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Orthorhombic
Space group: #21
Cell parameters: a = 5.90(1) Å · b = 15.66(4) Å · c = 17.33(4) Å
Ratio a:b:c: 1 : 2.654 : 2.937

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
29CuCopper Copper 9 63.546 571.914
51.66%
8OOxygen Oxygen 20 15.999 319.980
28.90%
15PPhosphorus Phosphorus 4 30.974 123.896
11.19%
26FeIron Iron 1 55.845 55.845
5.05%
17ClChlorine Chlorine 1 35.450 35.450
3.20%
Total 1107.085 100.00%
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
29CuCopper	Copper	9	63.546	571.914	51.66%
8OOxygen	Oxygen	20	15.999	319.980	28.90%
15PPhosphorus	Phosphorus	4	30.974	123.896	11.19%
26FeIron	Iron	1	55.845	55.845	5.05%
17ClChlorine	Chlorine	1	35.450	35.450	3.20%
	Total	1107.085	100.00%

Synonyms

Paulgrothiet

In other languages

German: IMA 2021-004 · Paulgrothit

Classification

Strunz

10th ed.

8.BB

8Phosphates, Arsenates, VanadatesClass
8.BPhosphates, etc., with additional anions, without H₂ODivision
8.BBWith only medium-sized cations, (OH, etc.):RO₄ about 1:1Group
8.BBPaulgrothiteSpecies

Literature, links & citation

Citations

2022(2022) Paulgrothite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Paulgrothite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/paulgrothite-55690},
  note      = {Accessed 2026-05-11}
}