Pyknite

Where it forms, where it's found

5recorded occurrences

Source · OpenStreetMap

Physical

Transparency: Translucent
Colour: white to lemon yellow
Streak: white

Optical

Luminescence: none

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 6 15.999 95.994
44.02%
13AlAluminium Aluminium 2 26.982 53.964
24.75%
9FFluorine Fluorine 2 18.998 37.996
17.43%
14SiSilicon Silicon 1 28.085 28.085
12.88%
1HHydrogen Hydrogen 2 1.008 2.016
0.92%
Total 218.055 100.00%
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	6	15.999	95.994	44.02%
13AlAluminium	Aluminium	2	26.982	53.964	24.75%
9FFluorine	Fluorine	2	18.998	37.996	17.43%
14SiSilicon	Silicon	1	28.085	28.085	12.88%
1HHydrogen	Hydrogen	2	1.008	2.016	0.92%
	Total	218.055	100.00%

Synonyms

Piknita
Pycnit
Pycnite
Pyknit
Stangenstein
Weißer Stangenschörl

Literature, links & citation

Citations

1810Klaproth, M. H. (1810) CLXXX. Chemische Untersuchung des Pycnits. In Beiträge zur chemischen Kenntniss der Mineralkörper Vol. 5. Rottmann. p.50-57.

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Pyknite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/pyknite-11121},
  note      = {Accessed 2026-05-11}
}