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Franckeite

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San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
© Rob Lavinsky

Show Franckeite Photos (16)
Formula:
Pb
 
5
Sn
 
3
Sb
 
2
S
 
14
System:TriclinicColour:Grey-black, black; ...
Hardness:2½
Name:After the mining engineers Carl and Ernest Francke.


Cylindrite-Franckeite Group

Classification of Franckeite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/C.17-70
Nickel-Strunz 10th (pending) edition ID:2.HF.25b

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
Dana 8th edition ID:3.1.4.2

3 : SULFOSALTS
1 : ø > 4
Hey's CIM Ref.:6.1.18

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn
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Type Occurrence of Franckeite

Type Locality:Chocaya mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia
Year of Discovery:1893

Physical Properties of Franckeite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Grey-black, black; iridescent at times
Streak:Grayish black
Hardness (Mohs):2½
Tenacity:Malleable
Cleavage:Perfect
{010} perfect.
Density (measured):5.9 g/cm3

Crystallography of Franckeite

Crystal System:Triclinic
Morphology:Thin tabular {010}, elongated [100]; {010} strictaed [001], and less markedly [100]. Usually massive, radial, or foliated; often in spherical, rosette-like or cauliform aggregates of thin plates. Crystals often warped or bent.
Twinning:Complex.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Franckeite

Type:Anisotropic
Anisotropism:Weak
Colour in reflected light:Gray-white
Pleochroism:Weak
Comments:Very weak.

Chemical Properties of Franckeite

Formula:
Pb
 
5
Sn
 
3
Sb
 
2
S
 
14
Essential elements:Pb, S, Sb, Sn
All elements listed in formula:Pb, S, Sb, Sn
Common Impurities:Zn,Ag,Ge,In

Relationship of Franckeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HF.20Vrbaite
Tl
 
4
Hg
 
3
Sb
 
2
As
 
8
S
 
20
2.HF.25aCylindrite
Pb
 
3
Sn
 
4
FeSb
 
2
S
 
14
2.HF.25bIncaite
(Pb,Ag)
 
4
Sn
 
4
FeSb
 
2
S
 
13
2.HF.25aLévyclaudite
Pb
 
8
Sn
 
7
Cu
 
3
(Bi,Sb)
 
3
S
 
28
2.HF.25bPotosíite
Pb
 
6
Sn
 
3
FeSb
 
3
S
 
16
2.HF.25bCoiraite
(Pb,Sn)
 
12.5
Sn
 
5
FeAs
 
3
S
 
28
2.HF.25aAbramovite
Pb
 
2
SnInBiS
 
7
2.HF.30Lengenbachite
(Ag,Cu)
 
2
Pb
 
6
As
 
4
S
 
13
Related Minerals - Hey's Index Grouping:

- +
6.1.1Kuramite
Cu
 
3
SnS
 
4
6.1.2Mohite
Cu
 
2
SnS
 
3
6.1.3Velikite
(Cu,Hg)
 
11
Sn
 
4
S
 
16
6.1.4Hemusite
Cu
 
6
SnMoS
 
8
6.1.5Kiddcreekite
Cu
 
6
SnWS
 
8
6.1.6Stannite
Cu
 
2
(Fe,Zn)SnS
 
4
6.1.7Rhodostannite
Cu
 
2
FeSn
 
3
S
 
8
6.1.8Mawsonite
Cu
 
6
Fe
 
2
SnS
 
8
6.1.9Chatkalite
Cu
 
6
FeSn
 
2
S
 
8
6.1.10Ferrokësterite
Cu
 
2
(Fe,Zn)SnS
 
4
6.1.11Kësterite
Cu
 
2
(Zn,Fe)SnS
 
4
6.1.12Stannoidite
Cu
+
6
Cu
2+
2
(Fe
2+
 
,Zn)
 
3
Sn
 
2
S
 
12
6.1.13Černýite
Cu
 
2
(Cd,Zn,Fe)SnS
 
4
6.1.14Vinciennite
Cu
+
7
Cu
2+
3
Fe
2+
2
Fe
3+
2
Sn(As,Sb)S
 
16
6.1.15Pirquitasite
Ag
 
2
ZnSnS
 
4
6.1.16Hocartite
Ag
 
2
(Fe
2+
 
,Zn)SnS
 
4
6.1.17Teallite
(Pb,Sn)SnS
 
2
6.1.19Lévyclaudite
Pb
 
8
Sn
 
7
Cu
 
3
(Bi,Sb)
 
3
S
 
28
6.1.20Cylindrite
Pb
 
3
Sn
 
4
FeSb
 
2
S
 
14
6.1.21Potosíite
Pb
 
6
Sn
 
3
FeSb
 
3
S
 
16
6.1.22Sakuraiite
(Cu,Zn,Fe)
 
3
(In,Sn)S
 
4
6.1.23Petrukite
(Cu,Fe,Zn,Ag)
 
3
(Sn,In)S
 
4
6.1.24Incaite
(Pb,Ag)
 
4
Sn
 
4
FeSb
 
2
S
 
13

Other Names for Franckeite

Synonyms:
IlijteriaLlicteria
Other Languages:
German:Franckeit
Varieties:
IncaitePotosíite

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 Franckeite

Reference List:Breithaupt In: Hintze (1904): 1(1): 1198.

Stelzner (1893), Jb. Min.: 11: 114.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 448-450.

American Mineralogist (1995): 80: 1174.

Articles/Blogs about Franckeite

Internet Links for Franckeite

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  • Raman and XRD data at RRUFF project
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    Localities for Franckeite

    Hide Locality List
    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.
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    (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.
    Argentina
     
    • Jujuy
      • Rinconada Department
        • Pirquitas Ag-Sn Deposit
    		No reference listed
    Australia
     
    • New South Wales
      • King Co.
        • Rye Park
    		McQueen, K. G. (1988): Teallite, low-antimony franckeite and tin-bearing galena from the Wallah Wallah mine, Rye Park, New South Wales. Australian Mineral. 3 (3), 111-116.
    Bolivia
     
    • Cochabamba Department
      • Arque Province
    		No reference listed
    Federico Ahlfeld y Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)
    • Oruro Department
      • Cercado Province
    		[MinRec 32:476]
    [MinRec 32:473]
    [MinRec 32:479]
      • Dalence Province
        • Huanuni
    		[MinRec 32:472]
    No reference listed
    Dana 7:I:440,449,483.
      • Poopó Province
        • Callipampa
    		Dana 7:I:449, 483.
    No reference listed
    Ahlfeld and Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia, Ministerio de Minas y Petroleo, La Paz
    [MinRec 32:479]
    • Potosí Department
      • Bustillos Province
        • Llallagua
    		[MinRec 32:474]
      • Chayanta Province
    		[MinRec 32:469]
    Dana 7:I:449.
      • Linares Province
    		[var: Potosíite] No reference listed
      • Potosí City
    		[MinRec 32:465]
      • Quijarro Province
      • Sud Chichas Province
        • Atocha-Quechisla District
    		[MinRec 32:461]
    [MinRec 32:461]
    Federico Ahlfeld y Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)
        • San Vicente District
    		Ahlfeld, F. & Schneider-Scherbina, A. (1964): Los Yacimientos Minerales y de Hidrocarburos de Bolivia.
    Salomon Rivas And Federico Ahlfeld (1998) Los Minerales de Bolivia y sus Parajes (Santa Cruz); Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia (USGS Bulletin no. 1975)
      • Sud Lípez Province
        • San Pablo de Lípez
          • Santa Isabel district
    		Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia (USGS Bulletin no. 1975)
    Canada
     
    • British Columbia
      • Liard Mining Division
        • Turnagain River area
    		[var: Potosíite] Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    China
     
    • Guangxi Zhuang Autonomous Region
      • Hechi Prefecture
        • Nandan Co.
          • Dachang Sn-polymetallic ore field
    		Anthony, J.W. et al.: Handbook of Mineralogy
    France
     
    • Auvergne
      • Puy-de-Dôme
        • Brioude - Massiac area
          • Anzat-le-Luguet
    		P. Picot, Z. Johan : "Atlas of Ore Minerals", BRGM, Elsevier, 1982
    • Brittany
      • Finistère
        • Huelgoat
    		R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
    Greece
     
    • Thraki (Thrace; Thracia) Department
      • Xánthi Prefecture
        • Kirki (Kirka)
    		Bull. Minéral. , 1985, 108, pp. 667-677.
    Japan
     
    • Kyushu Island
      • Oita Prefecture
    		[var: Incaite] No reference listed
    USA
     
    • California
        • Santa Cruz
    		Am Min 50:1164-1169
    Mineral and/or Locality
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