Claudetite Mineral Data

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:

Sublimation product of mine fires.

IMA Status:

Valid Species (Pre-IMA) 1868

Locality:

San Domingos, Algarve, Portugal. Link to MinDat.org Location Data.

Synonym:

ICSD 100434

PDF 15-778

Claudetite Image

Images:

Claudetite Arsenic

Comments: Colorless prismatic crystal of claudetite on native arsenic.
Location: J?chymov (St Joachimsthal), Krusn? Hory (Erzgebirge), Z?padocesk? 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

Diaphaniety:

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

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:

r_electron=3.64 gm/cc
note: r_Claudetite=4.00 gm/cc.

Fermion Index

Fermion Index = 0.00011
Boson Index = 0.99989

Photoelectric:

PE_Claudetite= 53.81 barns/electron
U=PE_Claudetite x r_electron= 195.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Claudetite is Not Radioactive

Claudetite Classification

Dana Class:

4.3.10.1 (4)Simple Oxides

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

(4.3.10)Dana Group

4.3.10.1 Claudetite As2O3 P 2₁/n 2/m

4.3.10.2 Bismite Bi2O3 P 2₁/c 2/m

Strunz Class:

IV/C.01-10 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.01 - Claudetite - Valentinite series

IV/C.01-10 Claudetite As2O3 P 2₁/n 2/m

IV/C.01-20 Valentinite Sb2O3 Pccn 2/m 2/m 2/m

IV/C.01-30 Auroantimonate* AuSbO3 Ortho ? Ortho

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Claudetite

As2O3
Dana No: 4.3.10.1 Strunz No: IV/C.01-10
Locality:

Notes: