Tsugaruite Mineral Data + Say TSUGARUITE


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General Tsugaruite Information

Help on Chemical  Formula: Chemical Formula: Pb4As2S7
Help on Composition: Composition: Molecular Weight = 1,203.11 gm
   Arsenic  12.45 %  As
   Lead     68.89 %  Pb
   Sulfur   18.66 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Pb4As2S7
Help on Environment: Environment: Found in a veinlet of barite at the Yunosawa mine.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Minami-Tsugara-gun provincial unit of the Aomori Prefecture in northern Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the discovery locality.
Help on Synonym: Synonym: IMA1997-010
 

Tsugaruite Image

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Tsugaruite

Comments: Brown-gray fibrous spherical tsugaruite on matrix.
Location: Yunosawa Mine, Aomori, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Tsugaruite

Comments: Dark gray veinlet of tsuraruite in matrix.
Location: Yunosawa mine, Tsugaru District, Aomori Prefecture, Japan. Scale: Picure size 3x2 cm.
© Dave Barthelmy

Tsugaruite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3982:1:0.2118
Help on Cell Dimensions: Cell Dimensions: a = 15.179, b = 38.117, c = 8.0745, Z = 16; V = 4,671.73 Den(Calc)= 6.84
Help on Crystal System: Crystal System: OrthorhombicSpace Group: Pba2 or Pbam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.395(1)(450), 2.819(0.53)(550), 2.739(0.48)(560,2.13.0),2.87(0.34)(192), 3.705(0.34)(1.10.0), 4.47(0.3)(340),
 

Physical Properties of Tsugaruite

Help on Cleavage: Cleavage: None
Help on Color: Color: Silvery lead gray.
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: lead gray
 

Calculated Properties of Tsugaruite

Help on Electron Density: Electron Density:

relectron=5.75 gm/cc
note: rTsugaruite =6.84 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.15364
Boson Index = 0.84636
Help on Photoelectric: Photoelectric:

PETsugaruite =1,267.91 barns/electron
U=PETsugaruite x relectron=7,294.95 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tsugaruite is Not Radioactive

 

Tsugaruite Classification

Help on  Dana Class: Dana Class: 3.3.4.2 (3)Sulfides - Sulfosalts
  (3.3)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.3.4)Dana Group
 
3.3.4.1 Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m
 
3.3.4.2 Tsugaruite ! Pb4As2S7 Pba2 or Pbam Ortho
Help on  Strunz Class: Strunz Class: II/E.15-45 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with Arsen and Antimon x = 3.8 - 3.1
  II/E.15 - Jordanite - Lengenbachite series
 
II/E.15-10 Jordanite Pb14(As,Sb)6S23 P 21/m 2/m
 
II/E.15-20 Geocronite Pb14(Sb,As)6S23 P 21/m 2/m
 
II/E.15-30 Gratonite Pb9As4S15 R 3m 3m
 
II/E.15-40 Meneghinite Pb13CuSb7S24 Pbnm 2/m 2/m 2/m
 
II/E.15-45 Tsugaruite Pb4As2S7 Pba2 or Pbam Ortho
 
II/E.15-50 Lengenbachite Pb6(Ag,Cu)2As4S13 P1 or P1 Tri
 

Other Tsugaruite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Eur. J. Min.,Vol.10,p793-799,1998)
Help on See Also: See Also: Links to other databases for Tsugaruite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Tsugaruite

Pb4As2S7
Dana No: 3.3.4.2 Strunz No: II/E.15-45
Locality:

 

Notes:

 

 
   
 
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