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Twinnite

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Formula:
Pb(Sb,As)
 
2
S
 
4
System:MonoclinicColour:Black
Hardness:
Member of:Sartorite Group
Name:Name after Robert Mitchell Thompson (1918-1967), professor of mineralogy, University of British Columbia, Vancouver (Canada). Thompson means "son of Thomas"; the latter is Aramaic for "a twin". The name is doubly appropriate in alluding to the polysynthetic twinning present in the mineral.

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 (Concession XIV; Lot 13), Huntingdon Township, Madoc Area, Hastings Co., Ontario, Canada
Year of Discovery:1966

Physical Properties of Twinnite

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

Crystallography of Twinnite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 7.997(2) Å, b = 19.517(5) Å, c = 8.634(2) Å
β = 91.061(4)°
Ratio:a:b:c = 0.41 : 1 : 0.442
Unit Cell Volume:V 1,347.34 ų (Calculated from Unit Cell)
Comment:Space group P21/n. Originally assumed to be triclinic, with the cell parameters 19.58, 7.98, 8.56 A, 89.77, 89.62 and 90.27°.

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

Member of:Sartorite Group
Other Members of Group:

- +
Baumhauerite
Pb
 
3
As
 
4
S
 
9
Sartorite
PbAs
 
2
S
 
4
Veenite
Pb
 
2
(Sb,As)
 
2
S
 
5
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
 
21-x
Pb
 
2x
(Sb,As)
 
91-x
S
 
147
(x = 0-17.5)
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
 
8
Pb
 
4-x
(Tl
 
2
As
 
2
)
 
x
(Ag
 
2
As
 
2
)As
 
16
S
 
40
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.05eDalnegroite
(Tl
 
4
Pb
 
2
)(As
 
12
Sb
 
8
)S
 
34
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
 
3+x
Pb
 
10-2x
Sb
 
11+x
S
 
28
, -0.13 < x > +0.20
2.HC.35Zoubekite
AgPb
 
4
Sb
 
4
S
 
10
2.HC.40Parasterryite
Ag
 
4
Pb
 
20
Sb
 
14
As
 
10
S
 
58
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
CuPb
 
9
(Sb,As)
 
11
S
 
26
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
 
3-2x
Ag
 
x
Bi
 
2+x
S
 
6
5.6.27Giessenite
Pb
 
27
Cu
 
2
(Bi,Sb)
 
19
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
Simplified Chinese:特硫锑铅矿
Spanish:Twinnita
Traditional Chinese:特硫銻鉛礦

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:

- +
JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 1. Canadian Mineralogist 9, 7-24.

JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 2. Mineral descriptions. Canadian Mineralogist 9, 191-213.

JAMBOR, J.L. (1968): New lead sulfantimonides from Madoc, Ontario. 3. Syntheses, paragenesis, origin. Canadian Mineralogist 10, 507-521.

JAMBOR, J.L., LAFLAMME, J.H.G. & WALKER, D.A. (1982): A re-examination of the Madoc sulfosalts. Mineralogical Record 13, 93-100.

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

Dan Topa and Emil Makovicky (2012): Twinnite, Pb0.8Tl0.1Sb1.3As0.8S4, the OD character and the question of its polytypism. Zeitschrift für Kristallographie - Crystalline Materials 227, 468-475.

Internet Links for Twinnite

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  • Localities for Twinnite

    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.
    Canada
     
    • Ontario
      • Hastings Co.
        • Madoc Area
          • Huntingdon Township
    JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 1. Canadian Mineralogist 9, 7-24. JAMBOR, J.L. (1967): New lead sulfantimonides from Madoc, Ontario. 2. Mineral descriptions. Canadian Mineralogist 9, 191-213. JAMBOR, J.L. (1968): New lead sulfantimonides from Madoc, Ontario. 3. Syntheses, paragenesis, origin. Canadian Mineralogist 10, 507-521. JAMBOR, J.L., LAFLAMME, J.H.G. & WALKER, D.A. (1982): A re-examination of the Madoc sulfosalts. Mineralogical Record 13, 93-100.
      • Thunder Bay District
        • Marathon
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Mineralogical Magazine 1988 52 : 691-697
    • Québec
      • Mauricie
        • Mékinac RCM
    Mineral. Deposita 42 (2007) 627-637.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Hautes-Alpes
        • La Chapelle en Valgaudemard
    No reference listed
    India
     
    • Rajasthan (Rajputana)
      • Udaipur Division
        • Udaipur District
    Chaudhuri, J. N. Bhadra and Friedrich, M. (1980): Investigations on some ores from Rajpura-Dariba in Rajasthan, India. Journal of Mines, Metals and Fuels 28(8), 196-201, 180.
    Iran
     
    • West Azarbaijan Province (West Azerbaijan 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
    Asadi, H.H., Voncken, J.H.L, Kühnel, R.A., and Hale, M. (2000): Mineralium Deposita 35, 656-671.
    Kyrgyzstan
     
    • Osh Oblast
      • Alai (Alay) Range
    [Lapis 1993:11 p11-24]
        • Fergana Valley
    [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
     
    • Maramureș Co.
      • Baia Mare (Nagybánya)
        • Chiuzbaia (Kisbánya)
    http://minerals-of-the-carpathians.eu
    Serbia
     
    • Podrinje District
      • Boranja orefield
        • Krupanj
    Bull. Mineral. (1983) 106, 505-510; Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Sweden
     
    • Västmanland
      • Sala
    Holmgren, J. (2002): Sala silvergruva. Hälleflintan (Medlemsblad för Upplands Geologiska Sällskap), UGS, 2002:3
    Mineral and/or Locality
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