Benavidesite Mineral Data

General Benavidesite Information

Chemical Formula:

Pb4(Mn,Fe)Sb6S14

Composition:

Molecular Weight = 2,063.39 gm

Manganese 2.00 % Mn

Iron 0.68 % Fe

Antimony 35.40 % Sb

Lead 40.17 % Pb

Sulfur 21.76 % S

______

100.00 %

Empirical Formula:

Pb₄Mn²⁺_0.75Fe²⁺_0.25Sb₆S₁₄

Environment:

Metamorphosed iron sulfide deposit associated with submarine felsic volcanism.

IMA Status:

Approved IMA 1982

Locality:

Satra mine, Dovertorp, Bergslagen, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for A. Benavides to honor his contributions in the development of mining in Peru.

Name Pronunciation:

Benavidesite + Pronunciation

Benavidesite Image

Images:

Benavidesite

Comments: Gray tabular benavidesite crystals associated with quartz.
Location: Bear Basin Mines, Bear Basin, North Bend, King County, Washington, USA. Scale: See Image.
© Rruff Database

Benavidesite Crystallography

Axial Ratios:

a:b:c =0.8223:1:0.2121

Cell Dimensions:

a = 15.74, b = 19.14, c = 4.06, Z = 2; beta = 91.5° V = 1,222.71 Den(Calc)= 5.60

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 3.45(1), 2.829(0.4), 4.1(0.3),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Help on Above

Leone P , Le Leuch L M , Palvadeau P , Molinie P , Moelo Y , Solid State Sciences , 5 (2003) p.771-776, Single crystal structures and magnetic properties of two iron or, manganese-lead-antimony sulfides: MPb4Sb6S14 (M: Fe, Mn), Loclaity: synthetic

Physical Properties of Benavidesite

Cleavage:

None

Color:

Lead gray, Gray.

Density:

5.6

Diaphaneity:

Opaque

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

brown gray

Optical Properties of Benavidesite

RL Anisotrophism:

Strong with tints of brown and blue.

RL Color:

White with a greenish tint with rare dull red internal reflections..

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Benavidesite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	42.00	40.70
420 nm	42.00	39.60
440 nm	42.00	39.30
460 nm	42.40	39.50
480 nm	43.00	39.90
500 nm	42.90	39.70
520 nm	42.70	39.50
540 nm	42.40	39.00
560 nm	42.20	38.90
580 nm	41.80	38.70
600 nm	41.30	38.30
620 nm	40.80	37.90
640 nm	40.90	37.50
660 nm	39.50	36.80
680 nm	38.70	36.10
700 nm	37.80	35.60

**Calculated Relative Intensity Colors of Benavidesite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%
R₁
R₂

Calculated Properties of Benavidesite

Electron Density:

Bulk Density (Electron Density)=4.79 gm/cc
note: Specific Gravity of Benavidesite =5.60 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Benavidesite= 843.95 barns/electron
U=PE_Benavidesite x rElectron Density=4,046.12 barns/cc.

Radioactivity:

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

Benavidesite Classification

Dana Class:

03.06.07.02 (03)Sulfides - Sulfosalts

(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.06.07)Dana Group

03.06.07.01 Jamesonite Pb4FeSb6S14 P 2₁/a 2/m

03.06.07.02 Benavidesite Pb4(Mn,Fe)Sb6S14 P 2₁/a 2/m

Strunz Class:

02.HB.15 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.15 Benavidesite Pb4(Mn,Fe)Sb6S14 P 2₁/a 2/m

02.HB.15 Jamesonite Pb4FeSb6S14 P 2₁/a 2/m

Other Benavidesite Information

References:

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

See Also:

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

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Ask about Benavidesite here :
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Print or Cut-and-Paste your Benavidesite Specimen Label here :

Benavidesite

Pb4(Mn,Fe)Sb6S14
Dana No: 03.06.07.02 Strunz No: 02.HB.15
Locality:

Notes: