Silver-bearing Tennantite

(Cu,Ag)6[Cu4(Fe,Zn)2]As4S13
Also known as
  • Argentiferous Tennantite
  • Fredericite
  • Fredricite

Where it forms, where it's found

13recorded occurrences
Source · OpenStreetMap

Safety & handling

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
47AgSilverSilver6107.868647.208
28.87%
29CuCopperCopper1063.546635.460
28.35%
16SSulfurSulfur1332.060416.780
18.59%
33AsArsenicArsenic474.922299.688
13.37%
30ZnZincZinc265.380130.760
5.84%
26FeIronIron255.845111.690
4.98%
Total2241.586100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From Mindat formula

Synonyms

  • Argentiferous Tennantite
  • Fredericite
  • Fredricite

Literature, links & citation

Citations
  1. 1995Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Silver-bearing Tennantite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/silver-bearing-tennantite-25593},
  note      = {Accessed 2026-05-11}
}