Watanabeite Mineral Data

Watanabeite Mineral Data +

General Watanabeite Information

Chemical Formula:

Cu4(As,Sb)2S5

Composition:

Molecular Weight = 592.45 gm

Copper 42.90 % Cu

Antimony 12.33 % Sb

Arsenic 17.70 % As

Sulfur 27.06 % S

______

100.00 %

Empirical Formula:

Cu₄As_1.4Sb_0.6S₅

Environment:

Hydrothermal veins.

IMA Status:

Approved IMA 1993

Locality:

Teine mine, Sapporo, Hokkaido, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Takeo Watanabe, (1907-1986), Japanese mineralogist.

Synonym:

IMA1991-025

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Watanabeite Crystallography

Axial Ratios:

a:b:c =1.0909:1:1.3503

Cell Dimensions:

a = 14.51, b = 13.3, c = 17.96, Z = 16; V = 3,465.97 Den(Calc)= 4.54

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 2.999(1), 1.833(0.4), 1.594(0.2),

Physical Properties of Watanabeite

Cleavage:

None

Color:

Lead gray, Silver gray.

Density:

4.66

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Metallic

Streak:

lead gray

Calculated Properties of Watanabeite

Electron Density:

r_electron=4.18 gm/cc
note: r_Watanabeite=4.54 gm/cc.

Fermion Index

Fermion Index = 0.00202
Boson Index = 0.99798

Photoelectric:

PE_Watanabeite= 72.90 barns/electron
U=PE_Watanabeite x r_electron= 304.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Watanabeite is Not Radioactive

Watanabeite Classification

Dana Class:

3.5.15.1 (3)Sulfides - Sulfosalts

(3.5)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.5.15)Dana Group

3.5.15.1 Watanabeite Cu4(As,Sb)2S5 Unk Ortho

Strunz Class:

II/C.12-05 II - Sulfides and sulphosalts

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

II/C.12 - Tetrahedrite group, Watanabeite - Gruzdevite series

II/C.12-05 Watanabeite Cu4(As,Sb)2S5 Unk Ortho

II/C.12-10 Sinnerite Cu6As4S9 P1 1

II/C.12-20 Nowackiite Cu6Zn3As4S12 R 3 3

II/C.12-30 Aktashite Cu6Hg3As4S12 R 3 3

II/C.12-40 Gruzdevite Cu6Hg3Sb4S12 R 3 3

Other Watanabeite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p1014,1994)

See Also:

Links to other databases for Watanabeite :
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 -École des Mines de Paris

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

Watanabeite

Cu4(As,Sb)2S5
Dana No: 3.5.15.1 Strunz No: II/C.12-05
Locality:

Notes: