Knopite

Where it forms, where it's found

6recorded occurrences

Source · OpenStreetMap

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
58CeCerium Cerium 1 140.116 140.116
39.48%
26FeIron Iron 1 55.845 55.845
15.74%
8OOxygen Oxygen 3 15.999 47.997
13.52%
22TiTitanium Titanium 1 47.867 47.867
13.49%
20CaCalcium Calcium 1 40.078 40.078
11.29%
11NaSodium Sodium 1 22.990 22.990
6.48%
Total 354.893 100.00%
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
58CeCerium	Cerium	1	140.116	140.116	39.48%
26FeIron	Iron	1	55.845	55.845	15.74%
8OOxygen	Oxygen	3	15.999	47.997	13.52%
22TiTitanium	Titanium	1	47.867	47.867	13.49%
20CaCalcium	Calcium	1	40.078	40.078	11.29%
11NaSodium	Sodium	1	22.990	22.990	6.48%
	Total	354.893	100.00%

Synonyms

Knopit
Knopita

Literature, links & citation

Citations

1894Holmquist, P.J. (1894): Knopit, ett perowskit närstående, et nytt mineral från Alnön. Geologiska Föreningen i Stockholm Förhandlingar. 16 : 73-95.
1944Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Knopite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/knopite-2228},
  note      = {Accessed 2026-05-11}
}