Rhodostannite Mineral Data

Rhodostannite Mineral Data +

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General Rhodostannite Information

Chemical Formula:

Cu2FeSn3S8

Composition:

Molecular Weight = 851.44 gm

Iron 13.12 % Fe

Copper 14.93 % Cu

Tin 41.83 % Sn

Sulfur 30.13 % S

______

100.00 %

Empirical Formula:

Cu₂2(Fe²⁺)Sn₃S₈

Environment:

As a replacement (alteration) product of stannite.

IMA Status:

Approved IMA 1968

Locality:

Vila Apacheta, Bolivia. Link to MinDat.org Location Data.

Name Origin:

Named for its reddish color compared to stannite.

Synonym:

ICSD 8215

PDF 29-558

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Rhodostannite Crystallography

Axial Ratios:

a:c = 1:1.41426

Cell Dimensions:

a = 7.29, c = 10.31, Z = 2; V = 547.92 Den(Calc)= 5.16

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4₁/a

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

By Intensity(I/I_o): 3.12(1), 5.93(0.6), 2.58(0.5),

Physical Properties of Rhodostannite

Color:

Reddish gray.

Diaphaniety:

Opaque

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Rhodostannite

RL Anisotrophism:

Distinct , from bluish gray to dark brown.

RL Color:

Reddish.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Rhodostannite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	29.10	30.40
420 nm	28.70	29.90
440 nm	28.30	29.40
460 nm	28.20	29.30
480 nm	28.20	29.40
500 nm	28.30	29.80
520 nm	28.50	30.20
540 nm	28.80	30.40
560 nm	28.90	30.60
580 nm	28.90	30.80
600 nm	28.90	30.80
620 nm	28.90	30.80
640 nm	28.80	30.70
660 nm	28.80	30.70
680 nm	28.70	30.50
700 nm	28.60	30.30

**Calculated Relative Intensity Colors of Rhodostannite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	310%
R₁
R₂

Calculated Properties of Rhodostannite

Electron Density:

r_electron=4.70 gm/cc
note: r_{Rhodostannite}=5.16 gm/cc.

Fermion Index

Fermion Index = 0.07455
Boson Index = 0.92545

Photoelectric:

PE_{Rhodostannite}= 139.14 barns/electron
U=PE_{Rhodostannite} x r_electron= 654.35 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rhodostannite is Not Radioactive

Rhodostannite Classification

Dana Class:

2.10.3.1 (2)Sulfides - Including Selenides and Tellurides

(2.10)where Am Bn Xp, with (m+n):p=3:4

(2.10.3)Dana Group

2.10.3.1 Rhodostannite Cu2FeSn3S8 I 4₁/a 4/m

2.10.3.2 Toyohaite Ag2FeSn3S8 I 4₁/a 4/m

Strunz Class:

II/C.06-150 II - Sulfides and sulphosalts

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

II/C.06 - Stannite group

II/C.06-10 Luzonite Cu3AsS4 I 42m 4 2m

II/C.06-20 Famatinite Cu3SbS4 I 42m 4 2m

II/C.06-30 Permingeatite Cu3SbSe4 I 42m 4 2m

II/C.06-40 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m

II/C.06-45 Barquillite! Cu2CdGeS4 I 42m 4 2m

II/C.06-50 Kuramite Cu3SnS4 I 42m 4 2m

II/C.06-60 Stannite Cu2FeSnS4 I 42m 4 2m

II/C.06-70 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

II/C.06-80 Kesterite Cu2(Zn,Fe)SnS4 I 4 4

II/C.06-90 Cernyite Cu2CdSnS4 I 42m 4 2m

II/C.06-100 Velikite Cu2HgSnS4 I 42m 4 2m

II/C.06-110 Hocartite Ag2FeSnS4 I 42m 4 2m

II/C.06-120 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

II/C.06-130 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 4₃2, P 43m, or P m3m Cubic

II/C.06-140 Petrukite (Cu,Fe,Zn)2(Sn,In)S4 P mn2₁ mm2

II/C.06-150 Rhodostannite Cu2FeSn3S8 I 4₁/a 4/m

II/C.06-160 Toyohaite Ag2FeSn3S8 I 4₁/a 4/m

Other Rhodostannite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Rhodostannite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Rhodostannite

Cu2FeSn3S8
Dana No: 2.10.3.1 Strunz No: II/C.06-150
Locality:

Notes: