Stibioclaudetite

AsSbO3
IMA status
  • Approved
IMA symbol
Scld
IMA approved
2007
Also known as
  • IMA2007-028
  • Stibioclaudetiet
  • Unnamed (As-Sb Oxide)

Where it forms, where it's found

Geological setting

Oxidation zone.

Type locality
Tsumeb Mine (Ongopolo Mine)
  1. Tsumeb
  2. Oshikoto Region
  3. Namibia

-19.2270°, 17.7276°

7recorded occurrences
Source · OpenStreetMap

Safety & handling

Physical

Hardness
123456789102/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Transparency
Transparent
Colour
Colorless
Streak
White
Tenacity
flexible
Cleavage
Perfect

On (010).

Optical

UV response
Does not fluoresce
Notes

Refractive index > 2.0

Crystallography

Crystal system
Monoclinic
Space group
#15
Cell parameters
a = 4.5757 Å · b = 13.1288 Å · c = 5.4216 Å
Cell angles
β = 95.039 °
Ratio a:b:c
1 : 2.869 : 1.185
Morphology

Bladed crystals to 6 mm bound by major (010), major (110), minor (111), and very minor (101).

Translation gliding
Deforms similarly to gypsum crystals.
Type-locality form

Colorless bladed crystals to 6 mm in length.

Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
51SbAntimonyAntimony1121.760121.760
49.76%
33AsArsenicArsenic174.92274.922
30.62%
8OOxygenOxygen315.99947.997
19.62%
Total244.679100.00%

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

From IMA formula

Synonyms

  • IMA2007-028
  • Stibioclaudetiet
  • Unnamed (As-Sb Oxide)

In other languages

German
IMA 2007-028 · Stibioclaudetit
Spanish
Estibioclaudetita
Italian
IMA2007-028 · stibioclaudetite

Classification

Strunz
10th ed.

4.CB.45

  • 4OxidesClass
  • 4.CMetal: Oxygen = 2: 3,3: 5, and similarDivision
  • 4.CBWith medium-sized cationsGroup
  • 4.CB.45StibioclaudetiteSpecies
Dana
8th ed.

04.03.10.03

  • 04Simple OxidesClass
  • 04.03A2X3Type
  • 04.03.10Claudetite groupGroup
  • 04.03.10.03StibioclaudetiteSpecies

Group, growth & confusion

In the same group
1 members

Literature, links & citation

Citations
  1. 1983Bodenstein, Doris, Brehm, Axel, Jones, Peter G., Schwarzmann, Einhard, Sheldrick, George M. (1983) Darstellung und Kristallstruktur von monoklinem Arsen(III)antimon(III)oxid, AsSbO3 / Preparation and Crystal Structure of Monoclinic Arsenic(III) Antimony(III) Oxide, AsSbO3. Zeitschrift für Naturforschung B, 38. 901-904 doi:10.1515/znb-1983-0801DOI: 10.1515/znb-1983-0801
  2. 2006Origlieri, M. (2006): Crystal structure and bonding in the new mineral AsSbO3. International Mineralogical Association 19th General Meeting, Kobe, Japan, July 23-28, 2006; Conference Abstract Volume.
  3. 2009Origlieri, Marcus, Downs, Robert T., Pinch, William W., Zito, Gary L. (2009) Stibioclaudetite, a new mineral from Tsumeb, Namibia. The Mineralogical Record, 40 (3) 209-213
  4. 2012Campostrini, I., Martini, B., Salvetti, A., Dalla Fontana, G., Boscardin, M., Ambrino, P., Ciriotti, M.E. (2012): Stibioclaudetite dalle gallerie inferiori di Biò, Borgofranco d’Ivrea (Torino). Micro, 10, 142-144
  5. 2013Kolitsch, U.; Brandstätter, F.; Schreiber, F.; Fink, R.; Auer, C. (2013) Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, 115. 19-87
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Stibioclaudetite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/stibioclaudetite-32285},
  note      = {Accessed 2026-05-11}
}