| |
 |
Tsugaruite Mineral Data
|
|
|
General Tsugaruite Information
|
 Chemical Formula: |
Pb4As2S7 |
| Composition: |
Molecular Weight = 1,203.11 gm |
| |
Arsenic 12.45 % As |
| |
Lead 68.89 % Pb |
| |
Sulfur 18.66 % S |
| |
______ |
| |
100.00 % |
| Empirical Formula: |
Pb4As2S7 |
| Environment: |
Found in a veinlet of barite at the Yunosawa mine. |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Minami-Tsugara-gun provincial unit of the Aomori Prefecture in northern Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the discovery locality. |
| Name Pronunciation: |
Tsugaruite + Pronunciation  |
| Synonym: |
IMA1997-010 |
| |
Tsugaruite Image |
|
Images:
|
|
|
Images:
|
|
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
|
| Axial Ratios: |
a:b:c =0.3982:1:0.2118 |
| Cell Dimensions: |
a = 15.179, b = 38.117, c = 8.0745, Z = 16; V = 4,671.73 Den(Calc)= 6.84 |
| Crystal System: |
Orthorhombic Space Group: Pba2 or Pbam |
| 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
|
| Cleavage: |
None |
| Color: |
Silvery lead gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
2.5-3 - Finger Nail-Calcite |
| Luster: |
Metallic |
| Streak: |
lead gray |
| |
Calculated Properties of Tsugaruite
|
| Electron Density: |
Bulk Density (Electron Density)=5.75 gm/cc
note: Specific Gravity of Tsugaruite =6.84 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.15
Boson Index = 0.85 |
| Photoelectric: |
PETsugaruite =1,267.91 barns/electron
U=PETsugaruite x rElectron Density=7,294.96 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsugaruite is Not Radioactive |
| |
Tsugaruite Classification
|
| Dana Class: |
03.03.04.02 (03)Sulfides - Sulfosalts |
| |
(03.03)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
| |
(03.03.04)Dana Group |
| |
03.03.04.01 Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m |
| |
03.03.04.02 Tsugaruite! Pb4As2S7 Pba2 or Pbam Ortho |
| Strunz Class: |
02.JB.30c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
| |
02.J - Sulfosalts of PbS Archetype |
| |
02.JB -Galena derivatives, with Pb |
| |
02.JB.30c Tsugaruite! Pb4As2S7 Pba2 or Pbam Ortho |
| |
Other Tsugaruite Information
|
| References: |
NAME( CanMin, 8/99) PHYS. PROP.(Eur. J. Min.,Vol.10,p793-799,1998) |
| See Also: |
Links to other databases for Tsugaruite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
Search for Tsugaruite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Tsugaruite :
Ask about Tsugaruite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
Print or Cut-and-Paste your Tsugaruite Specimen Label here :
|
Tsugaruite
Pb4As2S7
Dana No: 03.03.04.02 Strunz No: 02.JB.30c
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.
