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Billingsleyite

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North Lily Mine (International Smelting Company; Wicklow), East Tintic District, East Tintic Mts, Utah Co., Utah, USA
© 2007, JGW

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Formula:
Ag
 
7
AsS
 
6
System:IsometricColour:Dark lead-gray
Hardness:2½
Name:For Paul Billingsley (1887-1962), who discovered the mineral.
This page provides mineralogical data about Billingsleyite.

Classification of Billingsleyite

IMA status:Approved
Strunz 8th edition ID:2/E.05-10
Nickel-Strunz 10th (pending) edition ID:2.KB.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
K : Sulfarsenates, Sulfantimonates
B : Sulfarsenates with additional S
Dana 8th edition ID:3.1.6.1

3 : SULFOSALTS
1 : ø > 4
Hey's CIM Ref.:5.2.13

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

Type Locality:North Lily Mine (International Smelting Company; Wicklow), East Tintic District, East Tintic Mts, Utah Co., Utah, USA
Place of Conservation of Type Material:Smithsonian
Year of Discovery:1968
Associated Minerals at type locality:
TennantitePyriteGalenaBismuthiniteAcanthite

Physical Properties of Billingsleyite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Dark lead-gray
Hardness (Mohs):2½
Tenacity:Sectile
Density (measured):5.92(2) g/cm3
Density (calculated):5.90 g/cm3

Crystallography of Billingsleyite

Crystal System:Isometric
Class (H-M):2 3 - Tetartoidal
Space Group:P21 3
Cell Parameters:a = 10.4760(8) Å
Unit Cell Volume:V 1,149.71 ų (Calculated from Unit Cell)
Morphology:Fine-grained aggregates. Flattened octahedra.

Chemical Properties of Billingsleyite

Formula:
Ag
 
7
AsS
 
6
Essential elements:Ag, As, S
All elements listed in formula:Ag, As, S
Common Impurities:Cu,Fe

Relationship of Billingsleyite to other Species

Related Minerals - Hey's Index Grouping:

- +
5.2.1Smithite
AgAsS
 
2
5.2.2Trechmannite
AgAsS
 
2
5.2.3Proustite
Ag
 
3
AsS
 
3
5.2.4Xanthoconite
Ag
 
3
AsS
 
3
5.2.5Pearceite
[(Ag,Cu)
 
6
(As,Sb)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.6Pearceite-T2ac
5.2.7Argentotennantite
(Ag,Cu)
 
10
(Zn,Fe)
 
2
(As,Sb)
 
4
S
 
13
5.2.8Miargyrite
AgSbS
 
2
5.2.9Pyrargyrite
Ag
 
3
SbS
 
3
5.2.10Pyrostilpnite
Ag
 
3
SbS
 
3
5.2.11Stephanite
Ag
 
5
SbS
 
4
5.2.12Polybasite
[(Ag,Cu)
 
6
(Sb,As)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.14Polybasite-Tac
5.2.15Freibergite
(Ag
 
4+2x
Cu
 
2-2x
)[(Cu, Ag)
 
4
(Fe, Zn)
 
2
]Sb
 
4
S
 
12
S
 
1-x
 (0 < x < 1)
5.2.16Aramayoite
Ag(Sb,Bi)S
 
2
5.2.17Matildite
AgBiS
 
2
5.2.18Schapbachite
AgBiS
 
2
5.2.19Pavonite
(Ag,Cu)(Bi,Pb)
 
3
S
 
5
5.2.20Arcubisite
Ag
 
6
CuBiS
 
4
5.2.21Bohdanowiczite
AgBiSe
 
2
5.2.22Selenostephanite
Ag
 
5
Sb(Se,S)
 
4
5.2.23Benleonardite
Ag
 
8
(Sb,As)Te
 
2
S
 
3
5.2.24Volynskite
AgBiTe
 
2

Other Names for Billingsleyite

Synonyms:
IMA1967-012
Other Languages:
German:Billingsleyit
Russian:Биллингслеит
Spanish:Billingsleyita

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 Billingsleyite

Reference List:

- +
Frondel, C., Honea, R. M. (1968): Billingsleyite, a new silver sulfosalt. American Mineralogist, 53, 1791-1798.

Anzeiger der Österreichischen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse: 129(2): 9-11.

Pertlik, F. (1994): Hydrothermal synthesis and crystal structure determination of heptasilver(I)-disulfur-tetrathioarsenate(V), Ag7S2(AsS4), with a survey on thioarsenate anions. Journal of Solid State Chemistry, 112, 170-175

L. Bindi, R.T. Downs, S. Menchetti (2010): The crystal structure of billingsleyite, Ag7(As,Sb)S6, a sulfosalt containing As5+. Canadian Mineralogist, 48, 155-162.

Internet Links for Billingsleyite

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    • Localities for Billingsleyite

    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.
    Hide Locality List
    (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.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Blaß, G. & Graf, H. W. (2000): Neufunde von bekannten Fundorten im Schwarzwald. Mineralien-Welt, 11 (4), 57-60. (in German); BLAß, G. & GRAF, H. W. (2001): Billingsleyit – die Grube Clara, weltweit der zweite Fundpunkt. Erzgräber, 15, 4-6.
    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.
    USA
     
    • Utah
      • Utah Co.
        • East Tintic Mts
          • East Tintic District
    		AM 53 (1968), 1791; HB1 (1990); Am Min 53:1791-1798
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