Cylindrite Mineral Data

Cylindrite Mineral Data

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General Cylindrite Information

Chemical Formula:

Pb3Sn4FeSb2S14

Composition:

Molecular Weight = 1,844.71 gm

Iron 3.03 % Fe

Tin 25.74 % Sn

Antimony 13.20 % Sb

Lead 33.70 % Pb

Sulfur 24.34 % S

______

100.00 %

Empirical Formula:

Pb₃Sn₄Fe²⁺Sb₂S₁₄

Environment:

In tin-bearing hydrothermal veins.

IMA Status:

Valid Species (Pre-IMA) 1893

Locality:

Poopo, in Oruro, Boliva. Link to MinDat.org Location Data.

Name Origin:

From the Greek, kylindros, "cylinder."

Cylindrite Image

Images:

Cylindrite

Comments: Cylindrical crystals of cylindrite in granular tin sulfide ore.
Location: Montserrat Mine, Poopo, Oruro, Bolivia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cylindrite Crystallography

Axial Ratios:

a:b:c =2.0264:1:1.0017

Cell Dimensions:

a = 11.733, b = 5.79, c = 5.8, Z = 0.6666; alpha = 90°, beta = 92.38°, gamma = 93.87° V = 392.78 Den(Calc)= 5.20

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.88(1), 3.85(1), 5.73(0.5),

Physical Properties of Cylindrite

Cleavage:

None

Color:

Lead gray, Grayish black.

Density:

5.4 - 5.42, Average = 5.41

Diaphaniety:

Opaque

Fracture:

Malleable - Deforms rather than breaking apart with a hammer.

Habit:

Cylindrical - Shaped like a cylinder.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

black

Optical Properties of Cylindrite

RL Anisotrophism:

Distinct, gray to pale yellowish or brownish gray.

RL Color:

Galena white.

RL Pleochroism:

Exceptionally weak in air, stronger in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cylindrite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	33.80	38.00
420 nm	33.80	38.00
440 nm	33.80	37.90
460 nm	33.70	37.80
480 nm	33.40	37.40
500 nm	33.00	37.00
520 nm	32.60	36.40
540 nm	32.00	36.40
560 nm	31.50	35.90
580 nm	31.00	35.40
600 nm	30.60	35.00
620 nm	30.30	34.70
640 nm	29.90	34.40
660 nm	29.60	34.20
680 nm	29.30	34.00
700 nm	29.00	33.80

**Calculated Relative Intensity Colors of Cylindrite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%	290%
R₁
R₂

Calculated Properties of Cylindrite

Electron Density:

r_electron=4.50 gm/cc
note: r_Cylindrite=5.20 gm/cc.

Fermion Index

Fermion Index = 0.11971
Boson Index = 0.88029

Photoelectric:

PE_Cylindrite= 727.14 barns/electron
U=PE_Cylindrite x r_electron=3,271.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cylindrite is Not Radioactive

Cylindrite Classification

Dana Class:

3.1.4.1 (3)Sulfides - Sulfosalts

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

(3.1.4)Dana Group

3.1.4.1 Cylindrite Pb3Sn4FeSb2S14 P1 1

3.1.4.2 Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1

3.1.4.3 Incaite Pb4Sn4FeSb2S15 P1 ? 1

3.1.4.4 Potosiite Pb6Sn2FeSb2S14 P 1 ? 1

Strunz Class:

II/C.17-80 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.17 - Hertzenbergite - Kylindrite series

II/C.17-10 Herzenbergite SnS Pbnm 2/m 2/m 2/m

II/C.17-20 Stistaite SnSb R 3m 3 2/m

II/C.17-30 Mohite Cu2SnS3 P1 1

II/C.17-40 Teallite PbSnS2 Pbnm 2/m 2/m 2/m

II/C.17-45 Suredaite! PbSnS3 P nma 2/m 2/m 2/m

II/C.17-50 Potosiite Pb6Sn2FeSb2S14 P 1 ? 1

II/C.17-55 Levyclaudite Pb8Sn7Cu3(Bi,Sb)3S28 A2 ? 2

II/C.17-60 Incaite Pb4Sn4FeSb2S15 P1 ? 1

II/C.17-70 Franckeite (Pb,Sn)6FeSn2Sb2S14 P1 1

II/C.17-80 Cylindrite Pb3Sn4FeSb2S14 P1 1

Other Cylindrite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic1)

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Cylindrite

Pb3Sn4FeSb2S14
Dana No: 3.1.4.1 Strunz No: II/C.17-80
Locality:

Notes: