Pseudoboleite Mineral Data

General Pseudoboleite Information

Chemical Formula:

Pb5Cu4Cl10(OH)8•2(H2O)

Composition:

Molecular Weight = 10962.72 gm

Copper 13.91 % Cu 17.41 % CuO

Hydrogen 0.44 % H 3.94 % H₂O

Lead 58.59 % Pb 63.12 % PbO

Chlorine 20.05 % Cl 20.05 % Cl

- % Cl -4.52 % -O=Cl₂

Oxygen 7.01 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₃₁Cu₂₄Cl₆₂(OH)₄₈

Environment:

Sedimentary copper deposits.

IMA Status:

Valid Species (Pre-IMA) 1895

Locality:

Boleo, near Santa Rosalia, Baja California Sur, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named after its similarity to the mineral Boleite.

Name Pronunciation:

Pseudoboleite + Pronunciation

Synonym:

ICSD 67680

PDF 22-470

Percylite

Pseudoboleite Image

Images:

Pseudoboleite

Comments: Blue crystal of pseudoboleite.
Location: Curuglu Mine, Santa Rosalía (El Boleó), Boleó District, Mun. de Mulegé, Baja California Sur, Mexico. Scale: Crystal size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Pseudoboleite Crystallography

Axial Ratios:

a:c = 1:2.01706

Cell Dimensions:

a = 15.24, c = 30.74, Z = 2; V = 7,139.60 Den(Calc)= 5.10

Crystal System:

Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm

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

By Intensity(I/I_o): 3.83(1), 4.43(1), 2.71(0.95),

Physical Properties of Pseudoboleite

Cleavage:

{001} Perfect

Color:

Indigo blue.

Density:

Diaphaneity:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Pearly

Streak:

light green

Optical Properties of Pseudoboleite

Gladstone-Dale:

CI meas= -0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.199,KPDmeas= 0.203,KC= 0.1903
Ncalc = 1.95 - 1.97

Optical Data:

Uniaxial (-), e=2, w=2.03, bire=0.0300.

Calculated Properties of Pseudoboleite

Electron Density:

Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Pseudoboleite =5.10 gm/cc.

Fermion Index:

Fermion Index = 0.12
Boson Index = 0.88

Photoelectric:

PE_{Pseudoboleite}=1,051.91 barns/electron
U=PE_{Pseudoboleite} x rElectron Density=4,623.51 barns/cc.

Radioactivity:

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

Pseudoboleite Classification

Dana Class:

10.06.08.01 (10)Oxyhalides and Hydroxyhalides

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

(10.06.08)Dana Group

10.06.08.01 Pseudoboleite Pb5Cu4Cl10(OH)8•2(H2O) I 4/mmm 4/m 2/m 2/m

Strunz Class:

03.DB.10 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DB -With Pb, Cu, etc.

03.DB.10 Pseudoboleite Pb5Cu4Cl10(OH)8•2(H2O) I 4/mmm 4/m 2/m 2/m

Other Pseudoboleite Information

References:

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

See Also:

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

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

Pseudoboleite

Pb5Cu4Cl10(OH)8•2(H2O)
Dana No: 10.06.08.01 Strunz No: 03.DB.10
Locality:

Notes:

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