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Furutobeite

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Formula:
(Cu,Ag)
 
6
PbS
 
4
System:MonoclinicColour:Gray
Lustre:MetallicHardness:3
Name:Named after its discovery locality.
This page provides mineralogical data about Furutobeite.

Classification of Furutobeite

IMA status:Approved
Strunz 8th edition ID:2/B.09-40
Nickel-Strunz 10th (pending) edition ID:2.BE.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
E : With Pb (Bi)
Dana 8th edition ID:2.16.12.1

2 : SULFIDES
16 : Miscellaneous
Hey's CIM Ref.:3.6.8

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
6 : Sulphides etc. of Sb and Pb
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Type Occurrence of Furutobeite

Type Locality:Furutobe mine (Furutohbe mine), Kosaka, Akita Prefecture, Tohoku Region, Honshu Island, Japan
Year of Discovery:1981
Geological Setting of type material:Kuroko deposit
Associated Minerals at type locality:
StromeyeriteBorniteGalenaSphaleriteTennantite
DigeniteGold

Physical Properties of Furutobeite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Gray
Hardness (Mohs):3
Hardness (Vickers):VHN25=100 - 108 kg/mm2
Density (calculated):6.74 g/cm3

Crystallography of Furutobeite

Crystal System:Monoclinic
Cell Parameters:a = 20.02Å, b = 3.96Å, c = 9.07Å
β = 101.57°
Ratio:a:b:c = 5.056 : 1 : 2.29
Unit Cell Volume:V 704.45 ų (Calculated from Unit Cell)
Z:4
Morphology:Granular to 300 microns

Optical Data of Furutobeite

Type:Anisotropic
Anisotropism:Moderate from light yellow to dark brown
Colour in reflected light:Creamy yellow tint
Pleochroism:Weak

Chemical Properties of Furutobeite

Formula:
(Cu,Ag)
 
6
PbS
 
4
Essential elements:Cu, Pb, S
All elements listed in formula:Ag, Cu, Pb, S

Relationship of Furutobeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.BE.05Betekhtinite
Pb
 
2
(Cu,Fe)
 
21
S
 
15
2.BE.15Rhodplumsite
Rh
 
3
Pb
 
2
S
 
2
2.BE.15Shandite
Ni
 
3
Pb
 
2
S
 
2
2.BE.20Parkerite
Ni
 
3
Bi
 
2
S
 
2
2.BE.25Schlemaite
(Cu,◻)
 
6
(Pb,Bi)Se
 
4
2.BE.30Pašavaite
Pd
 
3
Pb
 
2
Te
 
2
Related Minerals - Hey's Index Grouping:

- +
3.6.1Herzenbergite
(Sn,Pb)SnS
 
2
3.6.2Ottemannite
beta Sn
 
2
S
 
3
3.6.3Berndtite
SnS
 
2
3.6.4Stistaite
SnSb
3.6.5Galena
PbS
3.6.6Clausthalite
PbSe
3.6.7Altaite
PbTe
3.6.9Aschamalmite
Pb
 
6
Bi
 
2
S
 
9
3.6.10Betekhtinite
Pb
 
2
(Cu,Fe)
 
21
S
 
15
3.6.11Shadlunite
(Pb,Cd)(Fe,Cu)
 
8
S
 
8

Other Names for Furutobeite

Synonyms:
IMA1978-040
Other Languages:
German:Furutobeit
Spanish:Furutobeita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Furutobeite

Reference List:

- +
American Mineralogist: 67: 1075.

Internet Links for Furutobeite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Furutobeite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Schwarzleo District
    Paar, W. H. & Chen, T. T. (1985): Zur Mineralogie von Cu-Ni(Co)-Pb-Ag-Hg-Erzen im Revier Schwarzleo bei Leogang, Salzburg, Österreich. Mitt. österr. geol. Ges. 78, 125-148.; Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Akita Prefecture
          • Kosaka
    [Bull.Min.(1981) 104, 737-741; Nickel & Nichols, 1991 - "Mineral Reference Manual", p72]
          • Odate
    Am. Min. 71 (1986), 210-221
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    Handbook of Mineralogy
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