Haydenite

Where it forms, where it's found

Type locality: Jones Falls Quarries
Baltimore City
Maryland
USA
39.3177°, -76.6262°

1recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 36 15.999 575.964
45.67%
14SiSilicon Silicon 8 28.085 224.680
17.81%
19KPotassium Potassium 4 39.098 156.392
12.40%
13AlAluminium Aluminium 4 26.982 107.928
8.56%
11NaSodium Sodium 4 22.990 91.960
7.29%
20CaCalcium Calcium 2 40.078 80.156
6.35%
1HHydrogen Hydrogen 24 1.008 24.192
1.92%
Total 1261.272 100.00%
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	36	15.999	575.964	45.67%
14SiSilicon	Silicon	8	28.085	224.680	17.81%
19KPotassium	Potassium	4	39.098	156.392	12.40%
13AlAluminium	Aluminium	4	26.982	107.928	8.56%
11NaSodium	Sodium	4	22.990	91.960	7.29%
20CaCalcium	Calcium	2	40.078	80.156	6.35%
1HHydrogen	Hydrogen	24	1.008	24.192	1.92%
	Total	1261.272	100.00%

Literature, links & citation

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Haydenite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/haydenite-10182},
  note      = {Accessed 2026-05-11}
}