Alurgite

Where it forms, where it's found

27recorded occurrences

Source · OpenStreetMap

Physical

Colour: Purple · reddish

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 12 15.999 191.988
37.78%
25MnManganese Manganese 2 54.938 109.876
21.62%
14SiSilicon Silicon 3 28.085 84.255
16.58%
13AlAluminium Aluminium 3 26.982 80.946
15.93%
19KPotassium Potassium 1 39.098 39.098
7.69%
1HHydrogen Hydrogen 2 1.008 2.016
0.40%
Total 508.179 100.00%
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	12	15.999	191.988	37.78%
25MnManganese	Manganese	2	54.938	109.876	21.62%
14SiSilicon	Silicon	3	28.085	84.255	16.58%
13AlAluminium	Aluminium	3	26.982	80.946	15.93%
19KPotassium	Potassium	1	39.098	39.098	7.69%
1HHydrogen	Hydrogen	2	1.008	2.016	0.40%
	Total	508.179	100.00%

Synonyms

Alurgit
Alurgita

Literature, links & citation

Citations

1893Penfield, S.L. (1893) On some minerals from the manganese mines of St. Marcel, in Piedmont, Italy. American Journal of Sciences: 46: 288-295.
1939Webb, Robert W. (1939) Investigation of a new occurrence of alurgite from California. American Mineralogist, 24 (2) 123-129
1950Schaller, Waldemar T. (1950) An interpretation of the composition of high-silica sericites. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (211) 406-415 doi:10.1180/minmag.1950.029.211.15 DOI: 10.1180/minmag.1950.029.211.15
1953Heinrich, E. Wm., Levinson, Alfred A. (1953) Studies in the mica group: Mineralogy of the rose muscovites. American Mineralogist, 38 (1-2) 25-49
1986Knurr, Rick A.; Bailey, S. W. (1986) Refinement of Mn-Substituted Muscovite and Phlogopite. Clays and Clay Minerals, 34 (1). 7-16 doi:10.1346/ccmn.1986.0340102DOI: 10.1346/ccmn.1986.0340102

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Alurgite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/alurgite-163},
  note      = {Accessed 2026-05-11}
}