Bideauxite Mineral Data

Bideauxite Mineral Data +

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General Bideauxite Information

Chemical Formula:

Pb2AgCl3(F,OH)2

Composition:

Molecular Weight = 665.63 gm

Silver 16.21 % Ag 17.41 % Ag₂O

Hydrogen 0.08 % H 0.68 % H₂O

Lead 62.26 % Pb 67.06 % PbO

Chlorine 15.98 % Cl 15.98 % Cl

- % Cl -3.61 % -O=Cl₂

Oxygen 1.20 % O

Fluorine 4.28 % F 4.28 % F

- % F -1.80 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₂AgCl₃F_1.5(OH)_0.5

Environment:

Rarely enclosing and replacing boleite, with other oxidized Pb and Cl minerals, from an oxidized base-metal mineral deposit.

IMA Status:

Approved IMA 1970

Locality:

From the Mammoth-St. Anthony mine, Tiger, Pinal Co., Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

For Richard August Bideaux (1935-2004), of Oro Valley, Arizona, USA, American mineralogist, author, and mineral collector.

Synonym:

ICSD 87757

PDF 25-461

Bideauxite Image

Images:

Bideauxite

Comments: Brownish cubic crystals of bideauxite with blue boleite in tan limonitic matrix.
Location: Mammoth-St Anthony mine, Pinal County, Arizona, USA. Scale: Specimen size 2 x 3 cm.
© Dave Barthelmy

Images:

Bideauxite

Comments: Richard Bideaux, American mineralogist, co-author of the Handbook of Mineralogy, Volumes I to V, mineral collector, and the person whom bideauxite is named after, kindly provided the mineral name pronunciation for bideauxite.
Location: Tucson Convention Center, 50th Tucson Gem and Mineral Show, February 14, 2004. Scale: NA.
© Dave Barthelmy

Bideauxite Crystallography

Cell Dimensions:

a = 14.132, Z = 16; V = 2,822.35 Den(Calc)= 6.27

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 2.718(1), 2.497(0.9), 3.53(0.9),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Cooper M A , Hawthorne F C , Merlino S , Pasero M , Perchiazzi N , The Canadian Mineralogist , 37 (1999) p.915-921, Stereoactive lone-pair behavior of Pb in the crystal structure of, bideauxite: Pb2AgCl3F(OH), Sample: CH

View Additional jPOWD Structure files for Bideauxite
[1]

Physical Properties of Bideauxite

Cleavage:

None

Color:

Colorless, Pale lavender.

Density:

6.274

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

white

Optical Properties of Bideauxite

Gladstone-Dale:

CI meas= -0.097 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.097 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1901,KPDmeas= 0.19,KC= 0.1732

Optical Data:

Isotropic, n=2.192.

Calculated Properties of Bideauxite

Electron Density:

r_electron=5.28 gm/cc
note: r_Bideauxite=6.27 gm/cc.

Fermion Index

Fermion Index = 0.13759
Boson Index = 0.86241

Photoelectric:

PE_Bideauxite=1,181.10 barns/electron
U=PE_Bideauxite x r_electron=6,230.33 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bideauxite is Not Radioactive

Bideauxite Classification

Dana Class:

10.6.9.1 (10)Oxyhalides and Hydroxyhalides

(10.6)where Am Bn (O,OH)p Xq

(10.6.9)Dana Group

10.6.9.1 Bideauxite Pb2AgCl3(F,OH)2 F d3m 4/m 3 2/m

Strunz Class:

III/D.12-80 III - Halogenides

III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds

III/D.12 - Boleite - Yedlinite series

III/D.12-10 Boleite KPb26Ag9Cu24Cl62(OH)48 P m3m 4/m 3 2/m

III/D.12-20 Pseudoboleite Pb5Cu4Cl10(OH)8·2(H2O) I 4/mmm 4/m 2/m 2/m

III/D.12-40 Cumengite Pb21Cu20Cl42(OH)40 I 4/mmm 4/m 2/m 2/m

III/D.12-50 Diaboleite Pb2CuCl2(OH)4 P 4mm 4mm

III/D.12-60 Chloroxiphite Pb3CuCl2(OH)2O2 P 2₁/m 2/m

III/D.12-70 Hematophanite Pb4Fe3O8(OH,Cl) P 4mm 4mm

III/D.12-80 Bideauxite Pb2AgCl3(F,OH)2 F d3m 4/m 3 2/m

III/D.12-90 Yedlinite Pb6CrCl6(O,OH)8 R 3 3

Other Bideauxite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Bideauxite

Pb2AgCl3(F,OH)2
Dana No: 10.6.9.1 Strunz No: III/D.12-80
Locality:

Notes: