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Twinnite

Formula:
Pb(Sb,As)
 
2
S
 
4
System:TriclinicColour:Black
Hardness:3½
Name:Name after Robert Mitchell Thompson (1918-1967), professor of mineralogy, University of British Columbia, Vancouver (Canada).


Sartorite Group

Classification of Twinnite

IMA status:Approved 1966
Strunz 8th edition ID:2/E.25-50
Nickel-Strunz 10th (pending) edition ID:2.HC.05a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
Dana 8th edition ID:3.7.8.3

3 : SULFOSALTS
7 : ø = 2
Hey's CIM Ref.:5.6.19

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
6 : Sulpharsenites etc. of Pb alone
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Type Occurrence of Twinnite

Type Locality:Taylor Pit (Lot 13; Con. XIV), Madoc, Huntingdon Township, Hastings Co., Ontario, Canada
Year of Discovery:1967

Physical Properties of Twinnite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Brownish black
Hardness (Mohs):3½

Crystallography of Twinnite

Crystal System:Triclinic
Cell Parameters:a = 19.58Å, b = 7.98Å, c = 8.56Å
α = 89.77°, β = 89.62°, γ = 90.27°
Ratio:a:b:c = 2.454 : 1 : 1.073
Unit Cell Volume:V 1,337.43 ų (Calculated from Unit Cell)

Chemical Properties of Twinnite

Formula:
Pb(Sb,As)
 
2
S
 
4
Essential elements:Pb, S, Sb
All elements listed in formula:As, Pb, S, Sb

Relationship of Twinnite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HC.05bBaumhauerite-2a
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
2.HC.05bBaumhauerite
Pb
 
3
As
 
4
S
 
9
2.HC.05eChabournéite
(Tl,Pb)
 
5
(Sb,As)
 
21
S
 
34
2.HC.05dDufrénoysite
Pb
 
2
As
 
2
S
 
5
2.HC.05aGuettardite
Pb(Sb,As)
 
2
S
 
4
2.HC.05cLiveingite
Pb
 
9
As
 
13
S
 
28
2.HC.05fParapierrotite
Tl(Sb,As)
 
5
S
 
8
2.HC.05fPierrotite
Tl
 
2
Sb
 
6
As
 
4
S
 
16
2.HC.05dRathite
(Pb,Tl)
 
3
As
 
5
S
 
10
2.HC.05aSartorite
PbAs
 
2
S
 
4
2.HC.05dVeenite
Pb
 
2
(Sb,As)
 
2
S
 
5
2.HC.05gMarumoite
Pb
 
32
As
 
40
S
 
92
2.HC.10aFülöppite
Pb
 
3
Sb
 
8
S
 
15
2.HC.10cHeteromorphite
Pb
 
7
Sb
 
8
S
 
19
2.HC.10bPlagionite
Pb
 
5
Sb
 
8
S
 
17
2.HC.10dRayite
Pb
 
8
(Ag,Tl)
 
2
Sb
 
8
S
 
21
2.HC.10dSemseyite
Pb
 
9
Sb
 
8
S
 
21
2.HC.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
2.HC.15Falkmanite
Pb
 
5.4
Sb
 
3.6
S
 
11
2.HC.15Plumosite
2.HC.20Robinsonite
Pb
 
4
Sb
 
6
S
 
13
2.HC.25Moëloite
Pb
 
6
Sb
 
6
S
 
14
(S
 
3
)
2.HC.30Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
2.HC.35Owyheeite
Ag
 
2
Pb
 
5
Sb
 
6
S
 
15
2.HC.35Zoubekite
AgPb
 
4
Sb
 
4
S
 
10
Related Minerals - Hey's Index Grouping:

- +
5.6.1Sartorite
PbAs
 
2
S
 
4
5.6.2Dufrénoysite
Pb
 
2
As
 
2
S
 
5
5.6.3Liveingite
Pb
 
9
As
 
13
S
 
28
5.6.4Baumhauerite
Pb
 
3
As
 
4
S
 
9
5.6.5Gratonite
Pb
 
9
As
 
4
S
 
15
5.6.6Jordanite
Pb
 
14
(As,Sb)
 
6
S
 
23
5.6.7Fülöppite
Pb
 
3
Sb
 
8
S
 
15
5.6.8Zinkenite
Pb
 
9
Sb
 
22
S
 
42
5.6.9Plagionite
Pb
 
5
Sb
 
8
S
 
17
5.6.10Heteromorphite
Pb
 
7
Sb
 
8
S
 
19
5.6.11Launayite
Pb
 
22
Sb
 
26
S
 
61
5.6.12Playfairite
Pb
 
16
Sb
 
18
S
 
43
5.6.13Semseyite
Pb
 
9
Sb
 
8
S
 
21
5.6.14Madocite
Pb
 
17
Sb
 
16
S
 
41
5.6.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
5.6.17Robinsonite
Pb
 
4
Sb
 
6
S
 
13
5.6.18Guettardite
Pb(Sb,As)
 
2
S
 
4
5.6.20Veenite
Pb
 
2
(Sb,As)
 
2
S
 
5
5.6.21Sorbyite
Pb
 
17
(Sb,As)
 
22
S
 
50
5.6.22Geocronite
Pb
 
14
(Sb,As)
 
6
S
 
23
5.6.23Galenobismutite
PbBi
 
2
S
 
4
5.6.24Cosalite
Pb
 
2
Bi
 
2
S
 
5
5.6.25Cannizzarite
Pb
 
4
Bi
 
6
S
 
13
5.6.26Lillianite
Pb
 
3
Bi
 
2
S
 
6
5.6.27Giessenite
Cu
 
2
Pb
 
26
(Bi,Sb)
 
20
S
 
57
5.6.28 Platynite
5.6.29Xilingolite
Pb
 
3
Bi
 
2
S
 
6
5.6.30Weibullite
Pb
 
5
Bi
 
8
Se
 
7
S
 
11
5.6.31Wittite
Pb
 
9
Bi
 
12
(S,Se)
 
27
5.6.32Kirkiite
Pb
 
10
Bi
 
3
As
 
3
S
 
19
5.6.33Ustarasite
Pb(Bi,Sb)
 
6
S
 
10
 (?)

Other Names for Twinnite

Synonyms:
IMA1966-017
Other Languages:
German:Twinnit
Spanish:Twinnita

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 Twinnite

Reference List:Canadian Mineralogist (1967): 9: 191-213.

American Mineralogist (1968): 53: 1424.

Bulletin de la Société française de Minéralogie et de Cristallographie (1982): 105: 3-10.

Articles/Blogs about Twinnite

Internet Links for Twinnite

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    Localities for Twinnite

    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.
    Canada
     
    • Ontario
      • Hastings Co.
        • Huntingdon Township
          • Madoc
    		http://www.ontariominerals.com
      • Thunder Bay District
        • Marathon
          • Hemlo gold deposit
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    • Québec
    		Mineral. Deposita 42 (2007) 627-637.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Hautes-Alpes
        • Valgaudemar
          • Pelvoux Mt.
    		No reference listed
    Iran
     
    • East Azarbaijan Province
      • Takab (Takan Tepe)
    		Daliran, F. (2008): The carbonate rock-hosted epithermal gold deposit of Agdarreh, Takab geothermal field, NW Iran—hydrothermal alteration and mineralisation. Mineralium Deposita, 43, 383-404
    Kyrgyzstan
     
    • Osh Oblast
      • Fergana Valley
        • Alai Range
    		[Lapis 1993:11 p11-24]
    [Lapis 11:11-24]
    Mexico
     
    • Mexico
      • Mun. de Temascaltepec
        • Temascaltepec de González (Temascaltepec)
    		Camprubi, A., Canals, A., Cardellach, E., Prol-Ledesma, R.M., Rivera, R., 2001, The La Guitarra Ag-Au low-sulfidation epithermal deposit, Temascaltepec district, Mexico: vein structure, mineralogy, and sulfide-sulfosalt chemistry. Society of Economic Geologists Special Publication, v. 8, p. 133-158.
    Romania
     
    • Maramures Co.
      • Baia Mare (Nagybánya)
    		Cook N.J., Damian Gh., New data on "Plumosite" and Other Sulfosalt Minerals from the Herja Vein Deposit, Baia Mare Dist., Romania, Geologica Carphathica, (1997)
    Serbia
     
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Sweden
     
    • Västmanland
      • Sala
    Mineral and/or Locality
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