Cossaite (of Piolti?)

Where it forms, where it's found

1recorded occurrences

Source · OpenStreetMap

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
50.23%
14SiSilicon Silicon 3 28.085 84.255
22.04%
13AlAluminium Aluminium 3 26.982 80.946
21.18%
11NaSodium Sodium 1 22.990 22.990
6.02%
1HHydrogen Hydrogen 2 1.008 2.016
0.53%
Total 382.195 100.00%
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	50.23%
14SiSilicon	Silicon	3	28.085	84.255	22.04%
13AlAluminium	Aluminium	3	26.982	80.946	21.18%
11NaSodium	Sodium	1	22.990	22.990	6.02%
1HHydrogen	Hydrogen	2	1.008	2.016	0.53%
	Total	382.195	100.00%

Synonyms

Cossaita

Literature, links & citation

Citations

1888Piolti, G. (1888): Sulla Cossaite del colle di Bousson (alta valle di Susa); Osservazioni. Accademia delle Scienze di Torino, fasc. 48 (A. XXIII, 257) (?).

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Cossaite (of Piolti?) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/cossaite-of-piolti-9935},
  note      = {Accessed 2026-05-11}
}