Stetefeldtite

Ag2Sb2(O,OH)7
IMA status
  • Approved
  • Grandfathered
  • Questionable
IMA symbol
Sf
Also known as
  • stetefeldite

Where it forms, where it's found

Type locality
Combination claim
  1. Belmont Mining District
  2. Toquima Range
  3. Nye County
  4. Nevada
  5. USA

38.5819°, -116.8617°

15recorded occurrences
Source · OpenStreetMap

Physical

Hardness
123456789103.5 – 4.5/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Colour
Brown · black · green · yellow
Streak
Shiny yellow
Density
4.12 g/cm³

Crystallography

Crystal system
Isometric
Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
51SbAntimonyAntimony2121.760243.520
35.28%
8OOxygenOxygen1415.999223.986
32.45%
47AgSilverSilver2107.868215.736
31.25%
1HHydrogenHydrogen71.0087.056
1.02%
Total690.298100.00%

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

From Mindat formula

Synonyms

  • stetefeldite

In other languages

German
Stetefeldtit
Italian
stetefeldtite

Classification

Strunz
10th ed.

4.DH.20

  • 4OxidesClass
  • 4.DMetal: Oxygen = 1:2 and similarDivision
  • 4.DHWith large (+- medium-sized) cations; sheets of edge-sharing octahedraGroup
  • 4.DH.20StetefeldtiteSpecies
Dana
8th ed.

44.01.01.05

  • 44AntimonatesClass
  • 44.01A2X2O6(O,OH,F)Type
  • 44.01.01Stibiconite GroupGroup
  • 44.01.01.05StetefeldtiteSpecies
CIM
—

24.1.5

  • 24Antimonates and AntimonitesClass
  • 24.1Antimonates and antimonites of Na, Cu or AgGroup
  • 24.1.5StetefeldtiteSpecies

Literature, links & citation

Citations
  1. 1867Riotte, E. (1867) Stetefeldtit, ein neues Mineral. Berg- und Huttenmænnische Zeitung: 26: 253-254.
  2. 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.
  3. 1953Mason, Brian, Vitaliano, Charles J. (1953) The mineralogy of the antimony oxides and antimonates. Mineralogical Magazine and Journal of the Mineralogical Society, 30 (221). 100-112 doi:10.1180/minmag.1953.030.221.03 DOI: 10.1180/minmag.1953.030.221.03
  4. 1954Fleischer, M. (1954) New mineral names. American Mineralogist, 39 (3-4). 402-408
  5. 2005(2005) Stetefeldtite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Stetefeldtite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/stetefeldtite-3769},
  note      = {Accessed 2026-05-11}
}