Sakuraiite Mineral Data

Sakuraiite Mineral Data +

General Sakuraiite Information

Chemical Formula:

(Cu,Zn,Fe,In,Sn)4S4

Composition:

Molecular Weight = 424.41 gm

Zinc 13.87 % Zn

Indium 24.35 % In

Iron 5.26 % Fe

Copper 20.96 % Cu

Silver 2.54 % Ag

Tin 2.80 % Sn

Sulfur 30.22 % S

______

100.00 %

Empirical Formula:

Cu_1.4Zn_0.9Fe²⁺_0.4Ag_0.1In_0.9Sn_0.1S₄

Environment:

Exsolved sulfide in stannite in a banded hydrothermal vein.

IMA Status:

Approved IMA 1967

Locality:

Ikuno mine Hyogo Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Kin-Ichi Sakurai (1912-1993), a Japanese amateur mineralogist.

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Sakuraiite Crystallography

Cell Dimensions:

a = 5.4563, Z = 1; V = 162.44 Den(Calc)= 4.34

Crystal System:

IsometricSpace Group: P 4₃2, P 43m, or P m3m

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

By Intensity(I/I_o): 3.15(1), 1.927(0.4), 1.65(0.2),2.73(0.1), 2.44(0.06), 3.85(0.06), 5.47(0.06),

Physical Properties of Sakuraiite

Cleavage:

None

Color:

Greenish gray, Greenish steel gray.

Diaphaniety:

Opaque

Habit:

Exsolution Inclusions - Formed by the exsolution of a separate mineral from the parent mineral caused by a temperature drop.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4 - Fluorite

Luster:

Metallic

Streak:

lead olive gray

Optical Properties of Sakuraiite

RL Anisotrophism:

Nearly isotropic.

RL Color:

Purplish olive-gray with a red tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Sakuraiite in Air**
λ	R	∑ R(λ)
400 nm	22.50
420 nm	22.50
440 nm	22.50
460 nm	22.60
480 nm	22.60
500 nm	22.60
520 nm	22.60
540 nm	22.70
560 nm	22.60
580 nm	22.50
600 nm	22.50
620 nm	22.60
640 nm	22.60
660 nm	22.60
680 nm	22.60
700 nm	22.40

**Calculated Relative Intensity Colors of Sakuraiite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	390%
R

Calculated Properties of Sakuraiite

Electron Density:

r_electron=4.00 gm/cc
note: r_Sakuraiite=4.34 gm/cc.

Fermion Index

Fermion Index = 0.01371
Boson Index = 0.98629

Photoelectric:

PE_Sakuraiite= 103.17 barns/electron
U=PE_Sakuraiite x r_electron= 413.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sakuraiite is Not Radioactive

Sakuraiite Classification

Dana Class:

2.9.2.5 (2)Sulfides - Including Selenides and Tellurides

(2.9)where Am Bn Xp, with (m+n):p=1:1

(2.9.2)Stannite Group (Tetragonal: I4¯2m) A2BCS type

2.9.2.1 Stannite Cu2FeSnS4 I 42m 4 2m

2.9.2.2 Cernyite Cu2CdSnS4 I 42m 4 2m

2.9.2.3 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m

2.9.2.4 Kuramite Cu3SnS4 I 42m 4 2m

2.9.2.5 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 4₃2, P 43m, or P m3m Cubic

2.9.2.6 Hocartite Ag2FeSnS4 I 42m 4 2m

2.9.2.7 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

2.9.2.8 Velikite Cu2HgSnS4 I 42m 4 2m

2.9.2.9 Kesterite Cu2(Zn,Fe)SnS4 I 4 4

2.9.2.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m

2.9.2.11 Barquillite! Cu2CdGeS4 I 42m 4 2m

Strunz Class:

II/C.06-130 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 Sakuraiite Information

References:

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

See Also:

Links to other databases for Sakuraiite :
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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Sakuraiite

(Cu,Zn,Fe,In,Sn)4S4
Dana No: 2.9.2.5 Strunz No: II/C.06-130
Locality:

Notes: