Rashleighite

Where it forms, where it's found

10recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 29 15.999 463.971
39.77%
26FeIron Iron 6 55.845 335.070
28.72%
13AlAluminium Aluminium 6 26.982 161.892
13.88%
15PPhosphorus Phosphorus 4 30.974 123.896
10.62%
29CuCopper Copper 1 63.546 63.546
5.45%
1HHydrogen Hydrogen 18 1.008 18.144
1.56%
Total 1166.519 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	29	15.999	463.971	39.77%
26FeIron	Iron	6	55.845	335.070	28.72%
13AlAluminium	Aluminium	6	26.982	161.892	13.88%
15PPhosphorus	Phosphorus	4	30.974	123.896	10.62%
29CuCopper	Copper	1	63.546	63.546	5.45%
1HHydrogen	Hydrogen	18	1.008	18.144	1.56%
	Total	1166.519	100.00%

Synonyms

Eisentürkis
Ferri-turquois
Ferrian Turquoise
Henwoodite
Rashleighit
Rashleighita

Literature, links & citation

Citations

1942Fairbanks (1942) The Mineralogist, Portland, Oregon: 10: 44 (as ferri-turquois).
1948Russell, Arthur (1948) On rashleighite, a new mineral from Cornwall, intermediate between turquoise and chalcosiderite. Mineralogical Magazine and Journal of the Mineralogical Society, 28 (202) 353-358 doi:10.1180/minmag.1948.028.202.01 DOI: 10.1180/minmag.1948.028.202.01
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.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Rashleighite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/rashleighite-3367},
  note      = {Accessed 2026-05-11}
}