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.

Name Pronunciation:

Sakuraiite + Pronunciation

Sakuraiite Image

Images:

Sakuraiite

Comments: Dark gray sakuraiite ore.
Location: Ikuno Mine, Kanagase, Asago-Gun-Hyogo, Japan. Scale: Specimen Size 2 cm.
© Thomas Witzke

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.

Diaphaneity:

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:

Bulk Density (Electron Density)=4.00 gm/cc
note: Specific Gravity of Sakuraiite =4.34 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Sakuraiite= 103.17 barns/electron
U=PE_Sakuraiite x rElectron Density= 413.13 barns/cc.

Radioactivity:

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

Sakuraiite Classification

Dana Class:

02.09.02.05 (02)Sulfides - Including Selenides and Tellurides

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

(02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type

02.09.02.01 Stannite Cu2FeSnS4 I 42m 4 2m

02.09.02.02 Cernyite Cu2CdSnS4 I 42m 4 2m

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

02.09.02.04 Kuramite Cu3SnS4 I 42m 4 2m

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

02.09.02.06 Hocartite Ag2FeSnS4 I 42m 4 2m

02.09.02.07 Pirquitasite Ag2ZnSnS4 I 42m 4 2m

02.09.02.08 Velikite Cu2HgSnS4 I 42m 4 2m

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

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

02.09.02.11 Barquillite! Cu2CdGeS4 I 42m 4 2m

Strunz Class:

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

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.05b Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 4₃2, P 43m, or P m3m Cubic

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 - 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
15 - WWW-MINCRYST

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Ask about Sakuraiite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Sakuraiite

(Cu,Zn,Fe,In,Sn)4S4
Dana No: 02.09.02.05 Strunz No: 02.CB.05b
Locality:

Notes: