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Claudetite

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Jáchymov (St Joachimsthal), Jáchymov (St Joachimsthal) District, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Thomas Witzke

Show Claudetite Photos (16)



Formula:
As
 
2
O
 
3
System:MonoclinicColour:Colourless, white
Hardness:2½
Name:Named after F. Claudet, French chemist, who first described the natural material.
Dimorph of:Arsenolite
This page provides mineralogical data about Claudetite.

Classification of Claudetite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/C.01-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:4.3.10.1

4 : SIMPLE OXIDES
3 : A2X3
Hey's CIM Ref.:7.13.2

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

Type Locality:São Domingos Mine, Mértola, Beja District, Portugal
Year of Discovery:1868

Physical Properties of Claudetite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent
Colour:Colourless, white
Hardness (Mohs):2½
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:
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°
Maximum Birefringence:δ = 0.140

Chart 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:
As
 
2
O
 
3
Essential elements:As, O
All elements listed in formula:As, O

Relationship of Claudetite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.CB.05Brizziite
NaSb
5+
 
O
 
3
4.CB.05Corundum
Al
 
2
O
 
3
4.CB.05Ecandrewsite
(Zn,Fe
2+
 
,Mn
2+
 
)TiO
 
3
4.CB.05Eskolaite
Cr
 
2
O
 
3
4.CB.05Geikielite
MgTiO
 
3
4.CB.05Hematite
Fe
 
2
O
 
3
4.CB.05Ilmenite
Fe
2+
 
TiO
 
3
4.CB.05Karelianite
V
3+
2
O
 
3
4.CB.05Melanostibite
Mn
2+
 
(Sb
5+
 
,Fe
3+
 
)O
 
3
4.CB.05Pyrophanite
Mn
2+
 
TiO
 
3
4.CB.05Akimotoite
(Mg,Fe
2+
 
)SiO
 
3
4.CB.05Auroantimonate
AuSbO
 
3
4.CB.05Romanite
(◻,Pb,Ca)UFe
2+
2
(Ti,Fe
3+
 
)
 
6
Ti
 
12
O
 
38
4.CB.05UM1998-11-O-AuHSb
Au
+
2
Sb
3+
 
O
 
2
(OH)
4.CB.05Tistarite
Ti
3+
2
O
 
3
4.CB.10Avicennite
Tl
 
2
O
 
3
4.CB.10Bixbyite
(Mn
3+
 
,Fe
3+
 
)
 
2
O
 
3
4.CB.15Armalcolite
(Mg,Fe
2+
 
)Ti
 
2
O
 
5
4.CB.15Pseudobrookite
Fe
 
2
TiO
 
5
4.CB.15Mongshanite
(Mg,Cr,Fe
2+
 
)
 
2
(Ti,Zr)
 
5
O
 
12
4.CB.20Zincohögbomite-2N2S
[(Zn,Al,Fe
2+
 
)
 
3
(Al,Fe
3+
 
,Ti)
 
8
O
 
15
(OH)]
 
2
4.CB.20Zincohögbomite-2N6S
[(Zn,Mg)
 
7
(Al,Fe
3+
 
,Ti)
 
16
O
 
31
(OH)]
 
2
4.CB.20Magnesiohögbomite-6N6S
[(Mg,Fe
2+
 
)
 
3
(Al,Ti,Fe
3+
 
)
 
8
O
 
15
(OH)]
 
6
4.CB.20Magnesiohögbomite-2N3S
[(Mg,Fe
2+
 
,Zn)
 
4
(Al,Ti,Fe
3+
 
)
 
10
O
 
19
(OH)]
 
2
4.CB.20Magnesiohögbomite-2N2S
[(Mg,Fe
2+
 
)
 
3
[Al
 
7
(Ti,Fe
3+
 
)]O
 
15
(OH)]
 
2
4.CB.20Ferrohögbomite-6N12S
[(Fe
2+
 
,Mg,Zn)
 
5
(Al,Ti,Fe
3+
 
)
 
12
O
 
23
(OH)]
 
6
4.CB.25Pseudorutile
Fe
 
2
Ti
 
3
O
 
9
4.CB.30Berdesinskiite
V
3+
2
TiO
 
5
4.CB.30Oxyvanite
V
3+
2
V
4+
 
O
 
5
4.CB.35Olkhonskite
(Cr,V)
 
2
Ti
 
3
O
 
9
4.CB.35Schreyerite
V
3+
2
Ti
 
3
O
 
9
4.CB.40Kamiokite
Fe
 
2
Mo
 
3
O
 
8
4.CB.40Nolanite
(V
3+
 
,Fe
3+
 
,Fe
2+
 
,Ti)
 
10
O
 
14
(OH)
 
2
4.CB.40Rinmanite
Zn
 
2
Sb
 
2
Mg
 
2
Fe
 
4
O
 
14
(OH)
 
2
4.CB.45Stibioclaudetite
AsSbO
 
3
4.CB.50Arsenolite
As
 
2
O
 
3
4.CB.50Sénarmontite
Sb
 
2
O
 
3
4.CB.55Valentinite
Sb
 
2
O
 
3
4.CB.60Bismite
Bi
 
2
O
 
3
4.CB.65Sphaerobismoite
Bi
 
2
O
 
3
4.CB.70Sillénite
Bi
 
12
SiO
 
20
4.CB.75Kyzylkumite
BeV
3+
2
TiO
 
6
4.CB.80Tietaiyangite
Fe
3+
4
Fe
2+
 
TiO
 
9
Related Minerals - Hey's Index Grouping:

- +
7.13.1Arsenolite
As
 
2
O
 
3
7.13.3Sénarmontite
Sb
 
2
O
 
3
7.13.4Valentinite
Sb
 
2
O
 
3
7.13.5Cervantite
Sb
3+
 
Sb
5+
 
O
 
4
7.13.6Stibiconite
7.13.7Bahianite
Al
 
5
Sb
 
3
O
 
14
(OH)
 
2
7.13.8Cyanophyllite
Cu
 
5
Al
 
2
Sb
3+
3
O
 
12
(OH) · 12H
 
2
O
7.13.9Bismutostibiconite
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
7.13.107.13.11Stibivanite
Sb
 
2
VO
 
5
7.13.12Bismite
Bi
 
2
O
 
3
7.13.13Sillénite
Bi
 
12
SiO
 
20

Other Names for Claudetite

Synonyms:
ArsenphylliteClaudelitePrismatic Arsenious AcidRhombarsenite
Other Languages:
French:Acide arsénieux prismatique
German:Claudetit
Rhombarsenit
Russian:Клаудетит
Spanish:Claudetita
Rhombarsenita
Varieties:
Antimonian Claudetite

Other Information

Health Warning:Contains arsenic in a highly soluble form - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

See:


http://membership.acs.org/c/ccs/pubs/CLIPS/JCE20020023.pdf

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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Claudetite details from Handbook of Mineralogy (PDF)
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    • Localities for Claudetite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Conselheiro Pena
    		Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
        • Galiléia
          • Laranjeiras
    		[MinRec 12:69]
    Chile
     
    • 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 (St Joachimsthal) District
            • 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 Mts
        • Goslar
          • Astfeld
    		No reference listed
        • 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
    Hungary
     
    • Pest Co.
      • Börzsöny Mts.
        • Nagybörzsöny
    		Szakáll & Jánosi: Minerals of Hungary, 1995
    Japan
     
    • Kyushu Region
      • Oita prefecture
        • Hayami-gun
    		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 (Oshikoto) Region
      • 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
     
    • Beja District
      • Mértola
    		Dana (1868); Dana 7:I:456, 545; AM 36 (1951), 833
    Republic of Macedonia
     
    • Roszdan
      • Allchar (Alsar)
    		Gunnar Farber specimens
    Romania
     
    • Covasna Co.
    		Kristály, F. & Szakáll, S. (2009): Mitt. Österr. Mineral. Ges. 155, 94. (Abs.)
    Slovakia
     
    • Košice Region
      • Gelnica Co.
        • Smolník Mining District
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • 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.
        • Island Mountain
    		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.
        • 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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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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