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Furutobeite

A valid IMA mineral species
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06311530014963402902215.jpg
Furutobeite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
03417060014947405283379.jpg
Furutobeite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00103900014947405323921.jpg
Furutobeite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
06311530014963402902215.jpg
Furutobeite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
03417060014947405283379.jpg
Furutobeite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00103900014947405323921.jpg
Furutobeite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
06311530014963402902215.jpg
Furutobeite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
01113160014947405329112.jpg
Furutobeite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
Hide all sections | Show all sections

About FurutobeiteHide

00355670015322306787324.jpg
Site of Furutohbe Mine

Furutobe mine, Kosaka, Akita Prefecture, Japan
Formula:
(Cu,Ag)6PbS4
Colour:
Gray
Lustre:
Metallic
Hardness:
3
Specific Gravity:
6.74 (Calculated)
Crystal System:
Monoclinic
Name:
Named after the Furutobe mine, Japan, the discovery locality.
This page provides mineralogical data about Furutobeite.


Unique IdentifiersHide

Mindat ID:
1622
Long-form identifier:
mindat:1:1:1622:9
GUID
(UUID V4):
ca926b87-27b4-45d3-a5e2-b8722eb59f96

IMA Classification of FurutobeiteHide

Classification of FurutobeiteHide

Strunz-mindat (2023):
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 ed.:
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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
FurIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
FurThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of FurutobeiteHide

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

Optical Data of FurutobeiteHide

Anisotropism:
Moderate from light yellow to dark brown
Reflectivity:
WavelengthR1R2
480nm32.0% 34.6%
546nm32.8% 34.9%
589nm33.2% 35.2%
657nm33.6% 34.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 35.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray with a creamy yellow tint
Pleochroism:
Weak

Chemistry of FurutobeiteHide

Mindat Formula:
(Cu,Ag)6PbS4
Elements listed:
Ag, Cu, Pb, S - search for minerals with similar chemistry

Crystallography of FurutobeiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 20.02 Å, b = 3.96 Å, c = 9.07 Å
β = 101.57°
Ratio:
a:b:c = 5.056 : 1 : 2.29
Unit Cell V:
704.45 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Granular to 300 microns
Comment:
Point Group: m, 2, or 2/m; Space Group: Cm, C2, or C2/m.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.43 Å(50)
2.95 Å(90)
2.61 Å(50)
2.55 Å(70)
2.50 Å(100)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of FurutobeiteHide

Type Locality:
ⓘ Furutobe mine (Furutohbe mine), Kosaka, Akita Prefecture, Japan
General Appearance of Type Material:
Grains 10-300 microns
Place of Conservation of Type Material:
Institute of Mineralogy, Petrology and Economic Geology, Faculty of Science, Tohoku University, Sendai, Japan
Geological Setting of Type Material:
Kuroko deposit
Associated Minerals at Type Locality:
Tennantite SubgroupStromeyeriteSphaleriteGoldGalena
DigeniteBornite
Reference:
Sugaki, A., Kitakaze, A., Odashima, Y. (1981) Furutobeite, a new copper-silver-lead sulfide mineral. Bulletin de Minéralogie: 104: 737-741.

Synonyms of FurutobeiteHide

Other Language Names for FurutobeiteHide

German:Furutobeit
Spanish:Furutobeita

Common AssociatesHide

Associated Minerals Based on Photo Data:
11 photos of Furutobeite associated with QuartzSiO2
5 photos of Furutobeite associated with GalenaPbS
4 photos of Furutobeite associated with AcanthiteAg2S
4 photos of Furutobeite associated with SilverAg
3 photos of Furutobeite associated with PyriteFeS2
2 photos of Furutobeite associated with Tennantite SubgroupCu6(Cu4C2+2)As4S12S
2 photos of Furutobeite associated with CalciteCaCO3

Related Minerals - Strunz-mindat GroupingHide

2.BE.ZipseriteBi5S4Trig. 3m (3 2/m) : R3m
2.BE.05BetekhtinitePb2(Cu,Fe)22-24S15Orth. mmm (2/m 2/m 2/m) : Immm
2.BE.15RhodplumsiteRh3Pb2S2Trig. 3m (3 2/m) : R3m
2.BE.15ShanditeNi3Pb2S2Trig. 3m (3 2/m) : R3m
2.BE.20ParkeriteNi3(Bi,Pb)2S2Mon.
2.BE.25Schlemaite(Cu,◻)6(Pb,Bi)Se4Mon. 2/m : P21/m
2.BE.30PašavaitePd3Pb2Te2Orth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

Thermal Behaviour:
When heated, it decomposes at 100+/-2°C into galena plus a solid solution of CuAgS and Cu2S, which when cooled forms stromeyerite and chalcocite.
Notes:
Etched iridescent by 20% FeCl3 solution and is blackened instantly by 20% KCN solution. Negative to KOH, HCl 1:1, HNO3 1:1 and HgCl2 solution.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for FurutobeiteHide

References for FurutobeiteHide

Reference List:
Sugaki, A., Kitakaze, A., Odashima, Y. (1981) Furutobeite, a new copper-silver-lead sulfide mineral. Bulletin de Minéralogie: 104: 737-741.
Sugaki, A., Kitakaze, A., Odashima, Y. (1981) Furutobeite, a new copper-silver-lead sulfide mineral. Bulletin de Minéralogie: 104: 737-741.
Fleischer, M., Cabri, L.J., Chao, G.Y., Mandarino, J.A., Pabst, A. (1982) New mineral names. American Mineralogist: 67: 1074-1082 (1075).
Fojt, B., Škoda, R., Dolníček, Z. (2010) Furutobeit a betechtinit z ložiska Horní Benešov v Nízkém Jeseníku (Furutobeite and betekhtinite from the ore deposit Horní Benešov in the Nízký Jeseník Mts. – Czech Republic). Acta Musei Moraviae, Scientiae Geologicae: 95(2): 81–86. (English summary)

Localities for FurutobeiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Salzburg
    • Zell am See District
      • Leogang
        • Hütten
          • Schwarzleograben
            • Schwarzleo mining 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, John Williams, Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. (1990) Handbook of Mineralogy Vol. 1 - Elements, Sulfides, Sulfosalts. Mineral Data Publishing, Tucson, Arizona.
Czech Republic
 
  • Moravian-Silesian Region
    • Bruntál District
      • Horní Benešov
Fojt, B., Škoda, R., Dolníček, Z. (2010) Furutobeite and betekhtinite from the ore deposit Horní Benešov in the Nízký Jeseník Mts. - Czech republic Acta Musei Moraviae, Scientiae geologicae, Brno, Moravské zemské muzeum: 1211-8796.
Egypt
 
  • South Sinai Governorate
Sallam, O. R., Alshami, A. S., Azab, M. S., & El Akeed, I. A. (2014) The Occurrence of Silver-Gold Mineralization Associated With Uranium Bearing Minerals and Base Metal Sulphide, El Sheikh Soliman Area, South Sinai, Egypt. Egyptian Journal of Pure and Applied Science 52(1):47-54
Japan (TL)
 
  • Akita Prefecture
    • Kosaka
Sugaki, A., Kitakaze, A., Odashima, Y. (1981) Furutobeite, a new copper-silver-lead sulfide mineral. Bulletin de Minéralogie: 104: 737-741.
Nickel, Ernest H., Nichols, Monte C. (1991) Mineral Reference Manual. Van Nostrand Reinhold, New York.
    • Odate
Bernstein, L.R. (1986) Renierite, Cu10ZnGe2Fe4S16- Cu11GeAsFe4S16: a coupled solid solution series. American Mineralogist: 71: 210-221.
Namibia
 
  • Oshikoto Region
    • Tsumeb
Handbook of Mineralogy
Russia
 
  • Bashkortostan
    • Beloretsk district
Kovalev, S. G., Snachev, V. I., & Romanovskaya, M. A. (2017). Geochemical specialization of terrigenous deposits of the Bashkirian meganticlinorium. Moscow University Geology Bulletin, 72(4), 269-278.
USA
 
  • Arizona
    • Cochise County
      • Bisbee
Schumer, B.N. (2017) Mineralogy of copper sulfides in porphyry copper and related deposits. Unpublished dissertation, University of Arizona, 204 pp.
  • Montana
    • Silver Bow County
      • Butte Mining District (Summit Valley Mining District)
Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
        • Walkerville
Species confirmed by Dr. Ben Schumer of Hazen Research, Golden, Colorado using SEM/BSE analysis.
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