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Finnemanite

Big Photo

Långban, Filipstad, Värmland, Sweden
© Thomas Witzke

Show Finnemanite Photos (3)
Formula:
Pb
 
5
[Cl|(AsO
 
3
)
 
3
]
System:HexagonalColour:Gray to black; pale ...
Hardness:2½
Name:After K.J. Finneman, of Långban, Sweden, who found the first specimen.
This page provides mineralogical data about Finnemanite.

Classification of Finnemanite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/J.03-10
Nickel-Strunz 10th (pending) edition ID:4.JB.45

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
Dana 8th edition ID:46.1.1.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
Hey's CIM Ref.:23.9

23 : Arsenites
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Type Occurrence of Finnemanite

Type Locality:Långban, Filipstad, Värmland, Sweden
Place of Conservation of Type Material:Swedish Museum of Natural History, Stockholm, Sweden.
Year of Discovery:1923
Geological Setting of type material:Crevices in Hematite in a metamorphosed Fe-Mn ore body.
Associated Minerals at type locality:
TrigoniteRouseiteHematite

Physical Properties of Finnemanite

Lustre:Sub-Adamantine
Diaphaneity (Transparency):Translucent, Opaque
Colour:Gray to black; pale olive-green in transmitted light.
Hardness (Mohs):2½
Cleavage:Distinct/Good
On {1011}, distinct
Density (measured):7.265 g/cm3
Density (calculated):7.35 g/cm3

Crystallography of Finnemanite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 10.322Å, c = 7.055Å
Ratio:a:c = 1 : 0.683
Unit Cell Volume:V 650.96 ų (Calculated from Unit Cell)
Z:2
Morphology:Crystals small, distorted, elongated parallel to [0001], exhibiting {1011} and {0001}; as crystalline crusts.

Optical Data of Finnemanite

Type:Uniaxial (-)
RI values: nω = 2.295 nε = 2.285
Maximum Birefringence:δ = 0.010

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Finnemanite

Formula:
Pb
 
5
[Cl|(AsO
 
3
)
 
3
]
Essential elements:As, Cl, O, Pb
All elements listed in formula:As, Cl, O, Pb

Relationship of Finnemanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JB.05Fetiasite
(Fe
3+
 
,Fe
2+
 
,Ti)
 
3
[O
 
2
|As
 
2
O
 
5
]
4.JB.10Manganarsite
Mn
 
3
[(OH)
 
4
|As
 
2
O
 
4
]
4.JB.15Magnussonite
Mn
 
10
As
 
6
O
 
18
(OH,Cl)
 
2
4.JB.15UM1984-09-AsO:ClHMn
Mn
 
10
As
 
6
O
 
18
(OH)Cl
4.JB.20Armangite
Mn
2+
26
[CO
 
3
|(HAsO
 
3
)
 
4
|(AsO
 
3
)
 
14
]
4.JB.25Nanlingite
NaCa
 
6
(Mg,Fe,Li)
 
12
(AsO
 
3
)
 
2
[Fe(AsO
 
3
)
 
6
]F
 
14
·
4.JB.30Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
[(AsO
 
3
)
 
3
|SiO
 
4
]
 
2
4.JB.35Stenhuggarite
CaFeSbO(AsO
 
3
)
 
2
4.JB.40Trigonite
Pb
 
3
Mn
2+
 
[HAsO
 
3
|(AsO
 
3
)
 
2
]
4.JB.50Gebhardite
Pb
 
8
[O|Cl
 
6
|(As
 
2
O
 
5
)
 
2
]
4.JB.55Derbylite
(Fe,Fe,Ti)
 
7
SbO
 
13
(OH)
4.JB.55Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
OH
4.JB.55Graeserite
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
4.JB.60Hemloite
(As,Sb)
 
2
(Ti,V,Fe,Al)
 
12
O
 
23
(OH)
4.JB.65Freedite
Pb
 
15
(Cu,Fe
2+
 
)
 
3
[O
 
7
|Cl
 
10
|(AsO
 
3
)
 
4
]
4.JB.70Georgiadèsite
Pb
 
16
[(OH)
 
6
|Cl
 
14
|(AsO
 
4
)
 
4
]
4.JB.75Ekatite
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(OH)
 
6
(AsO
 
3
)
 
6
[AsO
 
3
,HOSiO
 
3
]
 
2
Related Minerals - Hey's Index Grouping:

- +
23.2Nanlingite
NaCa
 
6
(Mg,Fe,Li)
 
12
(AsO
 
3
)
 
2
[Fe(AsO
 
3
)
 
6
]F
 
14
·
23.3Leiteite
Zn[As
 
2
O
 
4
]
23.5Kuznetsovite
(Hg-Hg)Hg
2+
 
[Cl|AsO
 
4
]
23.6Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
23.7Ecdemite
Pb
 
6
[As
 
2
O
 
7
|Cl
 
4
]
23.8Heliophyllite
Pb
 
3
AsO
 
4-n
Cl
 
2n+1
23.10Gebhardite
Pb
 
8
[O|Cl
 
6
|(As
 
2
O
 
5
)
 
2
]
23.11Zimbabweite
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
23.13Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
23.14Freedite
Pb
 
15
(Cu,Fe
2+
 
)
 
3
[O
 
7
|Cl
 
10
|(AsO
 
3
)
 
4
]
23.15Manganarsite
Mn
 
3
[(OH)
 
4
|As
 
2
O
 
4
]
23.17Armangite
Mn
2+
26
[CO
 
3
|(HAsO
 
3
)
 
4
|(AsO
 
3
)
 
14
]
23.18Karibibite
Fe
 
2
As
 
4
O
 
9
23.19Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
23.20Lazarenkoite
(Ca,Fe)FeAs
 
3
O
 
7
·3H
 
2
O
23.21Stenhuggarite
CaFeSbO(AsO
 
3
)
 
2
23.22Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
OH

Other Names for Finnemanite

Other Languages:
German:Finnemanit
Russian:Финнеманит
Spanish:Finnemanita

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 Finnemanite

Reference List:Aminoff (1923) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 45: 160.

American Mineralogist (1923): 8: 230.

Aminoff and Parsons (1927) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 49: 438.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1038-1039.

Traill, R.J. and A.P. Sabina (1960) Catalogue of X-ray diffraction patterns and specimen mounts on file at the Geological Survey of Canada. Geological Survey of Canada, Paper 60-4, 37.

Effenberger, H. and F. Pertlik (1979) Die Kristallstruktur des Finnemanits, Pb5Cl(AsO3)3, mit einem Vergleich zum Strukturtyp des Chlorapatits, Ca5Cl(PO4)3. Tschermaks Mineralogische und Petrographische Mitteilungen, 26, 95–107 (in German with English abstract).

Elliott, P. (1991): Minerals from the Beltana mine, Puttapa, South Australia. Mineral. Rec. 22, 449-456.

Internet Links for Finnemanite

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    Localities for Finnemanite

    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.
    (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.
    Australia
     
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
          • Puttapa
    		Elliott, P. (1991): Minerals from the Beltana mine, Puttapa, South Australia. Mineral. Rec. 22, 449-456.
    Germany
     
    • Saxony
      • Glauchau
        • Callenberg
    		Lapis, 16 (9), 13-26. Only presumed, not confirmed by any analytical data !
    Sweden
     
    • Värmland
      • Filipstad
    		Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm (1923): 45, 160; Rocks & Min.: 62:166; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1039; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
    Mineral and/or Locality
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