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Claudetite

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Formula:
As2O3
System:
Monoclinic
Colour:
Colourless, white
Hardness:
Name:
Named after F. Claudet, French chemist, who first described the natural material.
Dimorph of:
This page provides mineralogical data about Claudetite.

Classification of Claudetite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.CB.45

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4.3.10.1

4 : SIMPLE OXIDES
3 : A2X3
7.13.2

7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi
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Type Occurrence of Claudetite

Year of Discovery:
1868

Physical Properties of Claudetite

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, white
Hardness (Mohs):
Tenacity:
Elastic
Cleavage:
Perfect
on {010}
Fracture:
Fibrous

Crystallography of Claudetite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.33Å, b = 12.98Å, c = 4.54Å
β = 94.27°
Ratio:
a:b:c = 0.411 : 1 : 0.35
Unit Cell Volume:
V 313.22 ų (Calculated from Unit Cell)
Morphology:
Thin plates on {010} and elongated [001] with {111} and {1_11} prominent, resembling gypsum.
Twinning:
On {100} as penetration or contact twins, common.
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.924 (25)
3.454 (50)
3.356 (20)
3.328 (18)
3.245 (100)
2.771 (35)
2.264 (25)

Optical Data of Claudetite

Type:
Biaxial (-)
RI values:
nα = 1.870 nβ = 1.920 nγ = 2.010
2V:
Measured: 58° , Calculated: 78°
Max Birefringence:
δ = 0.140
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong

Chemical Properties of Claudetite

Formula:
As2O3
Essential elements:
All elements listed in formula:

Relationship of Claudetite to other Species

Other Members of Group:
4.CB.05BrizziiteNaSb5+O3
4.CB.05CorundumAl2O3
4.CB.05Ecandrewsite(Zn,Fe2+,Mn2+)TiO3
4.CB.05EskolaiteCr2O3
4.CB.05GeikieliteMgTiO3
4.CB.05HematiteFe2O3
4.CB.05IlmeniteFe2+TiO3
4.CB.05KarelianiteV23+O3
4.CB.05MelanostibiteMn2+(Sb5+,Fe3+)O3
4.CB.05PyrophaniteMn2+TiO3
4.CB.05Akimotoite(Mg,Fe2+)SiO3
4.CB.05AuroantimonateAuSbO3
4.CB.05Romanite(◻,Pb,Ca)UFe22+(Ti,Fe3+)6Ti12O38
4.CB.05UM1998-11-O-AuHSbAu2+Sb3+O2(OH)
4.CB.05TistariteTi23+O3
4.CB.10AvicenniteTl2O3
4.CB.10BixbyiteMn23+O3
4.CB.15Armalcolite(Mg,Fe2+)Ti2O5
4.CB.15PseudobrookiteFe2TiO5
4.CB.20Zincohögbomite-2N2S[(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2
4.CB.20Zincohögbomite-2N6S[(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2
4.CB.20Magnesiohögbomite-6N6S[(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6
4.CB.20Magnesiohögbomite-2N3S[(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2
4.CB.20Magnesiohögbomite-2N2S[(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2
4.CB.20Ferrohögbomite-6N12S[(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6
4.CB.25PseudorutileFe2Ti3O9
4.CB.25KleberiteFeTi6O11(OH)5
4.CB.30BerdesinskiiteV23+TiO5
4.CB.30OxyvaniteV23+V4+O5
4.CB.35Olkhonskite(Cr,V)2Ti3O9
4.CB.35SchreyeriteV23+Ti3O9
4.CB.40KamiokiteFe2Mo3O8
4.CB.40Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
4.CB.40RinmaniteZn2Sb2Mg2Fe4O14(OH)2
4.CB.40IseiteMn2Mo3O8
4.CB.40MajindeiteMg2Mo3O8
4.CB.45StibioclaudetiteAsSbO3
4.CB.50ArsenoliteAs2O3
4.CB.50SénarmontiteSb2O3
4.CB.55ValentiniteSb2O3
4.CB.60BismiteBi2O3
4.CB.65SphaerobismoiteBi2O3
4.CB.70SilléniteBi12SiO20
4.CB.75KyzylkumiteTi2V3+O5(OH)
4.CB.80TietaiyangiteFe43+Fe2+TiO9
7.13.1ArsenoliteAs2O3
7.13.3SénarmontiteSb2O3
7.13.4ValentiniteSb2O3
7.13.5CervantiteSb3+Sb5+O4
7.13.6Stibiconite
7.13.7BahianiteAl5Sb3O14(OH)2
7.13.8Cualstibite-1M(Cu,Al)3(OH)6[Sb5+(OH)6]
7.13.9BismutostibiconiteBi(Sb5+,Fe3+)2O7
7.13.107.13.11StibivaniteSb2VO5
7.13.12BismiteBi2O3
7.13.13SilléniteBi12SiO20

Other Names for Claudetite

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Claudetite

Reference List:
Palache, Charles (1934), Contributions to crystallography; claudetite, minasragrite, samsonite, native selenium, indium: American Mineralogist: 19: 194-205; …(abstract): American Mineralogist: 19: 128 (1934).

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 545-547.

Internet Links for Claudetite

Localities for Claudetite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • Victoria
    • Golden Plains Shire
Museum Victoria Mineralogy Collection
Brazil
 
  • Minas Gerais
    • Doce valley
      • Conselheiro Pena
Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
      • Galiléia
        • Laranjeiras
[MinRec 12:69]
Chile
 
  • Arica and Parinacota Region
    • Arica Province
      • Los Camarones
Samples analysed by Tony Kampf of LAC Mineralogical Museum, USA
  • Atacama Region
    • Chañaral Province
      • Diego de Almagro
Econ Geol (1991) 86:1287-1300
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
          • Jáchymov (St Joachimsthal)
Lapis 2002(7/8), 47
Sehrig, M. & Dietel, J. (2011): Silber, Uran, Arsen und Heilquellen: Auf Mineraliensuche in Jáchymov, einem der ältesten Bergwerke der Welt. Lapis 36 (7-8), 67-71; 86.
France
 
  • Midi-Pyrénées
    • Aveyron
      • Decazeville
        • Decazeville coal basin
Dana 7:I:547.
  • Rhône-Alpes
    • Loire
      • Saint-Etienne
        • La Ricamarie
Laurent, H. (1995) - Minéralisations des houillères embrasées, Le Règne Minéral,(2), 41-45.
Germany
 
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
Schnorrer, G. (1993): Mineralogische Notizen VI. Aufschluss, 44, 44-58.
      • St Andreasberg District
        • St Andreasberg
No reference listed
  • North Rhine-Westphalia
    • Sauerland
      • Arnsberg
        • Uentrop
Lapis, 14 (6), 11-32+50.
  • Saxony
    • Erzgebirge
      • Ehrenfriedersdorf
Wittern: "Mineralfundorte in Deutschland", 2001
      • Freiberg District
        • Freiberg
          • Freiberg smelter
John Sobolewski collection
      • Marienberg District
        • Lauta
Wolfgang Stoll
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Plaka
          • Plaka Mines
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German).
Hungary
 
  • Pest Co.
    • Börzsöny Mts
      • Nagybörzsöny (Deutsch Pilsen; Deutschpilsen)
Szakáll & Jánosi: Minerals of Hungary, 1995
Japan
 
  • Kyushu Region
    • Oita prefecture
      • Hayami-gun
        • Yamaga
Matsubara, S. et al (2001) Mineralogical Magazine, 65, 807-812.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
Jean-Pierre Barral specimens
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
New Zealand
 
  • South Island
    • West Coast (Westland)
      • Reefton
Quantification and controls on As distribution in Westland, NZ L. Haffert1, D. Craw1, J. Pope2
Portugal (TL)
 
  • Beja District
    • Mértola
      • Corte do Pinto
Dana (1868); Dana 7:I:456, 545; AM 36 (1951), 833
Republic of Macedonia
 
  • Roszdan
    • Allchar (Alsar; Alshar)
Gunnar Farber specimens
Romania
 
  • Covasna Co.
Kristály, F. & Szakáll, S. (2009): Mitt. Österr. Mineral. Ges. 155, 94. (Abs.)
Slovakia
 
  • Košice Region
    • Gelnica Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
UK
 
  • England
    • Cornwall
      • Camborne - Redruth - St Day District
        • Redruth
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
    • Cumbria
      • Caldbeck Fells
        • Coombe Height
[var: Antimonian Claudetite] [J.Russell Soc. 1998:36]
USA
 
  • Arizona
    • Mohave Co.
      • Hualapai Indian Reservation
The Canadian Mineralogist; October 2007; v. 45; no. 5; p. 1177-1188
    • Yavapai Co.
      • Black Hills (Black Hill Range)
        • Verde District
          • Jerome
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 175; Palache, C. (1934), Contributions to crystallography: Claudetite, minasragite, samsonite, native selenium, iridium, Am.Min.: 19: 194-205; Buerger, M.S. (1942), The unit cell and space group of claudetite As2O3 (abstract), Am.Min.: 27: 216; Galbraith, F.W. & Brennan (1959), Minerals of AZ: 30.
  • California
    • Imperial Co.
      • 4-S Ranch area
Palache, Charles (1934), Contributions to crystallography; claudetite, minasragrite, samsonite, native selenium, indium: American Mineralogist: 19: 194; Kelley, Vincent Cooper (1936), Occurrence of claudetite in Imperial County, California: American Mineralogist (1936): 21: 137-138; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 185-186.
    • Trinity Co.
      • Coastal Range
        • Island Mountain
          • Moose Peak
Landon, Robert Emmanuel (1927), Roemerite from California: American Mineralogist: 12: 279-283; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 151.
  • Connecticut
    • Middlesex Co.
Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.234
  • Nevada
    • Lander Co.
      • McCoy District
U. S. Geological Survey Open-File Report 02-195
    • Nye Co.
      • Toquima Range
        • Manhattan District
          • Manhattan
MinRecord 16:86
  • South Dakota
    • Custer Co.
      • Iron Mountain
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
  • Virginia
Minerals of Virginia, 1990 by R. V. Dietrich
Mineral and/or Locality  
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