Boleite Mineral Data

Boleite Mineral Data +

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General Boleite Information

Chemical Formula:

KPb26Ag9Cu24Cl62(OH)48

Composition:

Molecular Weight = 10936.64 gm

Potassium 0.36 % K 0.43 % K₂O

Copper 13.94 % Cu 15.70 % Cu₂O

Silver 8.88 % Ag 9.54 % Ag₂O

Hydrogen 0.44 % H 3.95 % H₂O

Lead 49.26 % Pb 53.06 % PbO

Chlorine 20.10 % Cl 20.10 % Cl

- % Cl -4.54 % -O=Cl₂

Oxygen 7.02 % O

______ ______

100.00 % 98.24 % = TOTAL OXIDE

Empirical Formula:

KAg₉Cu₂₄Pb₂₆Cl₆₂(OH)₄₈

Environment:

Sedimentary copper deposits. The fugitive presence of K in the formula was determined by microprobe.

IMA Status:

Valid Species (Pre-IMA) 1891

Locality:

Boleo, Baja California, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named after is locality.

Synonym:

ICSD 18002

PDF 27-1206

Percylite

Boleite Image

Images:

Boleite

Comments: Floater crystal of deep, inky blue boleite with interpenetration twinning.
Location: Amelia Mine, Santa Rosalia, Baja California, Mexico. Scale: 0.7 cm.
© John Veevaert

Images:

Boleite Cumengite

Comments: Inky blue cumengite "sixling" epitaxially overgrown on boleite.
Location: Amelia mine, Santa Rosalia, Baja California Sur, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Boleite Crystallography

Cell Dimensions:

a = 15.29, Z = 1; V = 3,574.56 Den(Calc)= 5.08

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

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

By Intensity(I/I_o): 4.415(1), 3.821(0.8), 2.702(0.6),

Forms:

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Forms: [ 1 1 1] [ 1 0 0]

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Crystal Structure:

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Cooper M A , Hawthorne F C , The Canadian Mineralogist , 38 (2000) p.801-808, Boleite: Resolution of the formula, KPb26Ag9Cu24Cl62(OH)48

Physical Properties of Boleite

Cleavage:

[001] Perfect, [101] Good

Color:

Indigo blue, Light blue.

Density:

4.8 - 5.1, Average = 4.94

Diaphaniety:

Transparent to subtranslucent

Fracture:

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

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Pearly

Streak:

light green

Optical Properties of Boleite

Gladstone-Dale:

CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2067,KPDmeas= 0.2121,KC= 0.2011

Optical Data:

Isotropic, n=2.05.

Calculated Properties of Boleite

Electron Density:

r_electron=4.42 gm/cc
note: r_Boleite=5.08 gm/cc.

Fermion Index

Fermion Index = 0.10889
Boson Index = 0.89111

Photoelectric:

PE_Boleite= 900.95 barns/electron
U=PE_Boleite x r_electron=3,980.61 barns/cc.

Radioactivity:

GRapi = 4.47 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Boleite - barely detectable

Boleite Classification

Dana Class:

10.6.6.1 (10)Oxyhalides and Hydroxyhalides

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

(10.6.6)Dana Group

10.6.6.1 Boleite KPb26Ag9Cu24Cl62(OH)48 P m3m 4/m 3 2/m

Strunz Class:

III/D.12-10 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 Boleite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(AmMin, v 86, p 770) OPTIC PROP.(Dana8)

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Boleite

KPb26Ag9Cu24Cl62(OH)48
Dana No: 10.6.6.1 Strunz No: III/D.12-10
Locality:

Notes: