Wood Iron (Goethite)

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
26FeIron Iron 1 55.845 55.845
62.85%
8OOxygen Oxygen 2 15.999 31.998
36.01%
1HHydrogen Hydrogen 1 1.008 1.008
1.14%
Total 88.851 100.00%
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
26FeIron	Iron	1	55.845	55.845	62.85%
8OOxygen	Oxygen	2	15.999	31.998	36.01%
1HHydrogen	Hydrogen	1	1.008	1.008	1.14%
	Total	88.851	100.00%

Synonyms

Wood iron ore

Literature, links & citation

Citations

1953Arkell, W. J., Tomkeieff, S. I. (1953) English Rock Terms - Chiefly as used by miners and quarrymen. Oxford University Press, London.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Wood Iron (Goethite) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/wood-iron-goethite-46411},
  note      = {Accessed 2026-05-11}
}