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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 (17)



Formula:
As
 
2
O
 
3
System:MonoclinicColour:Colourless, white
Hardness:2½
Member of:Claudetite Group
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

Member of:Claudetite Group
Other Members of Group:

- +
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.25Kleberite
FeTi
 
6
O
 
11
(OH)
 
5
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
V
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
7.13.8Cualstibite-1M
(Cu,Al)
 
3
(OH)
 
6
[Sb
5+
 
(OH)
 
6
]
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
     
    • 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 (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
        • 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 (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Plaka
            • Plaka Mines
    		Fritz Schreiber collection
    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.
        • 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.
        • 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
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