Claudetite Mineral Data

General Claudetite Information

Chemical Formula:

As2O3

Composition:

Molecular Weight = 197.84 gm

Arsenic 75.74 % As 100.00 % As₂O₃

Oxygen 24.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

As₂O₃

Environment:

Secondary oxidation product derived from realgar, arsenopyrite, or other arsenic-bearing minerals or as a sublimation product of mine fires. Dimorphous with arsenolite.

IMA Status:

Valid Species (Pre-IMA) 1868

Locality:

San Domingo mines, Algarve, Portugal. Link to MinDat.org Location Data.

Name Origin:

Named for Frederick Claudet, the French chemist who first described naturally occurring material.

Synonym:

ICSD 100434

PDF 15-778

Claudetite Image

Images:

Claudetite Arsenic

Comments: Colorless prismatic crystal of claudetite on native arsenic.
Location: JÃ¡chymov (St Joachimsthal), KrusnÃ© Hory (Erzgebirge), ZÃ¡padoceskÃ½ Kraj, Bohemia, Czech Republic. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Claudetite Crystallography

Axial Ratios:

a:b:c =0.4111:1:0.3496

Cell Dimensions:

a = 5.339, b = 12.984, c = 4.5405, Z = 4; beta = 94.26° V = 313.89 Den(Calc)= 4.19

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.245(1), 3.454(0.5), 2.771(0.35),

Forms:

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Forms: ( 0 1 0) ( 1 1 1) ( 1 1 0)

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Crystal Structure:

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Frueh A J , American Mineralogist , 36 (1951) p.833-850, The crystal structure of claudetite (monoclinic As2O3)

View Additional jPOWD Structure files for Claudetite
[1] [2]

Physical Properties of Claudetite

Cleavage:

{010} Perfect

Color:

Colorless, White.

Density:

3.85 - 4.15, Average = 4

Diaphaneity:

Transparent

Fracture:

Flexible - Flexible fragments.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Claudetite

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2228,KPDmeas= 0.2333,KC= 0.235
Ncalc = 1.9 - 1.98

Optical Data:

Biaxial (-), a=1.87, b=1.92, g=2.01, bire=0.1400, 2V(Calc)=78, 2V(Meas)=58. Dispersion strong, r > v.

Calculated Properties of Claudetite

Electron Density:

Bulk Density (Electron Density)=3.64 gm/cc
note: Specific Gravity of Claudetite =4.00 gm/cc.

Fermion Index:

Fermion Index = 0.0001164526
Boson Index = 0.9998835474

Photoelectric:

PE_Claudetite= 53.81 barns/electron
U=PE_Claudetite x rElectron Density= 195.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Claudetite is Not Radioactive

Claudetite Classification

Dana Class:

04.03.10.01 (04)Simple Oxides

(04.03)with a cation charge of 3+ (A+++2 O3)

(04.03.10)Claudetite group

04.03.10.01 Claudetite As2O3 P 2₁/n 2/m

04.03.10.02 Bismite Bi2O3 P 2₁/c 2/m

04.03.10.03 Stibioclaudetite! AsSbO3 P 2₁/n 2/m

Strunz Class:

04.CB.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.C - Metal:Oxygen = 2:3, 3:5, and Similar

04.CB -With medium-sized cations

04.CB.45 Claudetite As2O3 P 2₁/n 2/m

04.CB.45 Stibioclaudetite! AsSbO3 P 2₁/n 2/m

Other Claudetite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Claudetite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Claudetite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Claudetite Specimen Label here :

Claudetite

As2O3
Dana No: 04.03.10.01 Strunz No: 04.CB.45
Locality:

Notes: