Pellouxite Mineral Data

Pellouxite Mineral Data

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General Pellouxite Information

Chemical Formula:

(Cu,Ag)Pb10Sb12S27(Cl,S)0.6O

Composition:

Molecular Weight = 4,532.07 gm

Copper 0.90 % Cu

Silver 0.60 % Ag

Antimony 31.27 % Sb

Lead 47.36 % Pb

Sulfur 19.15 % S

Chlorine 0.33 % Cl

Oxygen 0.39 % O

______

100.00 %

Empirical Formula:

Cu_0.64Ag_0.25Pb_10.36Sb_11.64S_27.07Cl_0.42O_1.11

Environment:

In cavities of calcite veins. Structurally related to scainiite.

IMA Status:

Approved IMA 2004 ( Dana # Added)

Locality:

Fe-Ba deposit of Buca della Vena mine, Apuan Alps (Tuscany, Italy). Link to MinDat.org Location Data.

Name Origin:

Named for Alberto Pelloux (1868-1948), curator of the mineralogical Museum at the University of Genova.

Synonym:

IMA2001-033

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Pellouxite Crystallography

Axial Ratios:

a:b:c =13.6515:1:5.9004

Cell Dimensions:

a = 55.824, b = 4.0892, c = 24.128, Z = 4; beta = 113.15° V = 5,064.33 Den(Calc)= 5.94

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.423(1)(807,16.0.4,407), 4.02(0.38)(606,406), 3.562(0.31)(804,12.0.2),2.948(0.27)(13.1.3,11.1.13.009(0.25)(808,912,713), 2.048(0.2)(020), 2.265(0.19)(409),

Crystal Structure:

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Palvadeau P , Meerschaut A , Orlandi P , Moelo Y , European Journal of Mineralogy , 16 (2004) p.845-855, Lead-antimony sulfosalts from Tuscany (Italy). VII. Crystal structure of, pellouxite, ~ (Cu,Ag)2Pb21Sb23S55ClO, an expanded monoclinic derivative, of Ba12Bi24S48 hexagonal sub-type (zinkenite group), Locality: Tuscany, Italy

Physical Properties of Pellouxite

Color:

Black.

Diaphaniety:

Opaque

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Luster:

Metallic

Optical Properties of Pellouxite

Optical Data:

NCalc= 1.43 - from Gladstone-Dale relationship (KC = 0.0723) where Ncalc=Dcalc*KC+1

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Pellouxite in Air**
λ	R	∑ R(λ)
470 nm	38.00
546 nm	37.30
589 nm	36.90
650 nm	35.20

**Standardized Intensity (100%) Reflection Spectra of Pellouxite in Oil**
λ	R	∑ R(λ)
470 nm	23.80
546 nm	22.40
589 nm	21.50
650 nm	19.60

**Calculated Relative Intensity Colors of Pellouxite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	250%
R

**Calculated Relative Intensity Colors of Pellouxite in Oil**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	420%
R

Calculated Properties of Pellouxite

Electron Density:

r_electron=5.04 gm/cc
note: r_Pellouxite=5.94 gm/cc.

Fermion Index

Fermion Index = 0.10611
Boson Index = 0.89389

Photoelectric:

PE_Pellouxite= 968.58 barns/electron
U=PE_Pellouxite x r_electron=4,881.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pellouxite is Not Radioactive

Pellouxite Classification

Dana Class:

3.8.1.3 (3)Sulfides - Sulfosalts

(3.8)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.8.1)Dana Group

3.8.1.1 Zinkenite Pb9Sb22S42 P 6₃ 6

3.8.1.2 Pillaite! Pb9Sb10S23ClO0.5 C 2/m 2/m

3.8.1.3 Pellouxite ! (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O C 2/m 2/m

Strunz Class:

II/E.20-25 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x), Sulfosalts with predominant Iron and Copper x = 2.0

II/E.20 - Madocite - Dadsonite series

II/E.20-10 Madocite Pb17(Sb,As)16S41 Pb2a mm2

II/E.20-20 Launayite Pb22Sb26S61 C 2/m 2/m

II/E.20-25 Pellouxite (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O C 2/m 2/m

II/E.20-30 Sterryite Ag2Pb10(Sb,As)12S29 Pbam 2/m 2/m 2/m

II/E.20-40 Playfairite Pb16Sb18S43 P 2₁/m 2/m

II/E.20-50 Sorbyite Pb19(Sb,As)20S49 C 2/m 2/m

II/E.20-60 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono

Other Pellouxite Information

References:

NAME( EurJMin, 16:839) PHYS. PROP.(EurJMin, 16:839) OPTIC PROP.(EurJMin, 16:839)

See Also:

Links to other databases for Pellouxite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Pellouxite

(Cu,Ag)Pb10Sb12S27(Cl,S)0.6O
Dana No: 3.8.1.3 Strunz No: II/E.20-25
Locality:

Notes: