Meneghinite Mineral Data

General Meneghinite Information

Chemical Formula:

Pb13CuSb7S24

Composition:

Molecular Weight = 4,378.98 gm

Copper 1.45 % Cu

Antimony 19.46 % Sb

Lead 61.51 % Pb

Sulfur 17.57 % S

______

100.00 %

Empirical Formula:

Pb₁₃CuSb₇S₂₄

Environment:

In hydrothermal veins and contact metamorphic deposits.

IMA Status:

Valid Species (Pre-IMA) 1852

Locality:

Marble Lake, Barrie Township, Frontenac Co. Ontario, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Giuseppi Meneghini (1811-1889) of Pisa, Italy who first observed the mineral.

Name Pronunciation:

Meneghinite + Pronunciation

Synonym:

ICSD 31126

PDF 43-1476

Meneghinite Image

Images:

Meneghinite

Comments: Black, acicular crystals of meneghinite on matrix.
Location: Bottino Mine, Tuscany, Italy. Scale: 1x1 cm.
© Dave Barthelmy

Meneghinite Crystallography

Axial Ratios:

a:b:c =0.472:1:0.1717

Cell Dimensions:

a = 11.343, b = 24.028, c = 4.126, Z = 1; V = 1,124.54 Den(Calc)= 6.47

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm

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

By Intensity(I/I_o): 3.27(1), 2.922(0.9), 3.74(0.8),

Forms:

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Forms: ( 1 4 1) ( 1 3 1) ( 1 1 1) ( 1 4 0) ( 1 3 0) ( 0 4 1) ( 1 2 0) ( 1 0 0) ( 1 0 1)

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Crystal Structure:

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Euler R , Hellner E , Zeitschrift fur Kristallographie , 113 (1960) p.345-372, Uber komplex zusammengesetzte sulfidische erze VI., Zur kristallstruktur des meneghinits, CuPb13Sb7S24

Physical Properties of Meneghinite

Cleavage:

{010} Perfect

Color:

Blackish gray, Lead gray.

Density:

6.34 - 6.43, Average = 6.38

Diaphaneity:

Opaque

Fracture:

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

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

metallic

Optical Properties of Meneghinite

Optical Data:

NCalc= 1.02 - from Gladstone-Dale relationship (KC = 0.0038) where Ncalc=Dcalc*KC+1
NCalc= 1.02 - from Gladstone-Dale relationship (KC = 0.0038) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Weak.

RL Color:

White.

RL Pleochroism:

Strong.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Meneghinite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	38.50	44.50
420 nm	39.20	45.20
440 nm	39.90	45.90
460 nm	40.20	46.40
480 nm	40.40	46.60
500 nm	40.40	46.50
520 nm	40.30	46.30
540 nm	40.00	46.00
560 nm	39.80	45.60
580 nm	39.50	45.10
600 nm	39.20	44.50
620 nm	38.80	43.80
640 nm	38.50	43.00
660 nm	38.20	42.10
680 nm	37.80	41.20
700 nm	37.40	40.20

**Calculated Relative Intensity Colors of Meneghinite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R₁
R₂

Calculated Properties of Meneghinite

Electron Density:

Bulk Density (Electron Density)=5.43 gm/cc
note: Specific Gravity of Meneghinite =6.47 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_Meneghinite=1,196.13 barns/electron
U=PE_Meneghinite x rElectron Density=6,489.52 barns/cc.

Radioactivity:

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

Meneghinite Classification

Dana Class:

03.03.05.01 (03)Sulfides - Sulfosalts

(03.03)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.03.05)Dana Group

03.03.05.01 Meneghinite Pb13CuSb7S24 Pbnm 2/m 2/m 2/m

Strunz Class:

02.HB.05b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HB -With Cu, Ag, Hg, Fe, Sn and Pb

02.HB.05b Meneghinite Pb13CuSb7S24 Pbnm 2/m 2/m 2/m

Other Meneghinite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Meneghinite :
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
16 - WWW-MINCRYST

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

Meneghinite

Pb13CuSb7S24
Dana No: 03.03.05.01 Strunz No: 02.HB.05b
Locality:

Notes: