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Billingsleyite

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Formula:
Ag7AsS6
Colour:
Dark lead-grey
Lustre:
Metallic
Hardness:
Specific Gravity:
5.92
Crystal System:
Isometric
Name:
For Paul Billingsley (1887-1962), who discovered the mineral.
This page provides mineralogical data about Billingsleyite.


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Classification of BillingsleyiteHide

Approved
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
3.1.6.1

3 : SULFOSALTS
1 : ø > 4
5.2.13

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

Physical Properties of BillingsleyiteHide

Metallic
Transparency:
Opaque
Colour:
Dark lead-grey
Hardness:
2½ on Mohs scale
Tenacity:
Sectile
Density:
5.92(2) g/cm3 (Measured)    5.90 g/cm3 (Calculated)

Chemical Properties of BillingsleyiteHide

Formula:
Ag7AsS6
Common Impurities:
Cu,Fe

Crystallography of BillingsleyiteHide

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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.11 (40)
3.53 (60)
3.34 (50)
3.19 (70)
3.05 (100)
2.83 (60)
2.49 (60)
Comments:
Tintic, Utah, USA.

Type Occurrence of BillingsleyiteHide

General Appearance of Type Material:
Fine-grained aggregates.
Place of Conservation of Type Material:
National School of Mines, Paris, France; Harvard University, Cambridge, Massachusetts, 110530; National Museum of Natural History, Washington, D.C., USA, R18987.
Geological Setting of Type Material:
Believed to have occurred in a body of high-grade silver ore.
Associated Minerals at Type Locality:

Synonyms of BillingsleyiteHide

Other Language Names for BillingsleyiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Alabandite1 photo of Billingsleyite associated with Alabandite on mindat.org.
Pyrargyrite1 photo of Billingsleyite associated with Pyrargyrite on mindat.org.
Chalcopyrite1 photo of Billingsleyite associated with Chalcopyrite on mindat.org.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.2.1SmithiteAgAsS2Mon. 2/m
5.2.2TrechmanniteAgAsS2Trig.
5.2.3ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
5.2.4XanthoconiteAg3AsS3Mon. 2/m : B2/b
5.2.5Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]Trig. 3m (3 2/m) : P3m1
5.2.6Pearceite-T2acTrig. 3 2 : P3 2 1
5.2.7ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
5.2.8MiargyriteAgSbS2Mon. 2/m : B2/b
5.2.9PyrargyriteAg3SbS3Trig. 3m : R3c
5.2.10PyrostilpniteAg3SbS3Mon.
5.2.11StephaniteAg5SbS4Orth. mm2 : Cmc21
5.2.12Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]Mon. 2/m : B2/m
5.2.14Polybasite-TacTrig. 3m (3 2/m) : P3m1
5.2.15FreibergiteAg6[Cu4Fe2]Sb4S13-xIso. 4 3m : I4 3m
5.2.16AramayoiteAg3Sb2(Bi,Sb)S6Tric. 1 : P1
5.2.17MatilditeAgBiS2Hex.
5.2.18SchapbachiteAg0.4Pb0.2Bi0.4SIso.
5.2.19PavoniteAgBi3S5Mon. 2/m : B2/m
5.2.20ArcubisiteAg6CuBiS4
5.2.21BohdanowicziteAgBiSe2Trig. 3m (3 2/m) : P3m1
5.2.22SelenostephaniteAg5Sb(Se,S)4Orth.
5.2.23Benleonardite[Ag6(Sb,As)2S6Te] [Ag9Cu(S,Te)2Te2]Trig. 3m (3 2/m) : P3m1
5.2.24VolynskiteAgBiTe2Orth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for BillingsleyiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 BillingsleyiteHide

Localities for BillingsleyiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Austria
 
  • Lower Austria
    • Mostviertel
      • Annaberg
Kolitsch, U., Auer, C. & Zeug, M. (2017): 2046) Austinit, Billingsleyit, Konichalcit, Lenait?, Luzonit, Marrit, Trechmannit und Zinkrosasit von Annaberg, Niederösterreich (ein Vorbericht). Pp. 265-268 in Walter, F. et al. (2017): Neue Mineralfunde aus Österreich LXVI. Carinthia II, 207./127., 217-284.
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.
Italy
 
  • Tuscany
    • Grosseto Province
      • Gavorrano
Rivista Mineralogica Italiana anno 2014 n. 1 pg. 8-24 e 26-31
Orlandi, P. (2011): Zibaldone di mineralogia italiana 2010. Micro, 1/2011, 39-42
    • Lucca Province
      • Apuan Alps
        • Pietrasanta
          • Valdicastello Carducci
Biagioni, C., Bindi, L., Orlandi, P., Michelucci, E., Bazzoni, C., Bernocchi, M. & Mangoni, G. (2014): Billingsleyite e fettelite. Nuovi ritrovamenti toscani. Rivista Mineralogica Italiana, 38(1), 26-31.
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.
Peru
 
  • Lima Department
    • Oyon Province
Frank Keutsch EDS- (Ag7AsS6, Sb-free) and SXRD-analysis (P213, a = 10.46 A).
Romania
 
  • Hunedoara Co.
    • Deva
Andy Roberts
Turkey
 
  • Marmara Region
    • Balikesir Province
      • Sindirgi
Blanks, D. E., Holwell, D. A. and Coller, I. V. (2014), Multi Stage Epithermal Au-Ag Mineralisation in the Kiziltepe Deposit, Western Turkey: Evidence From 3D High Resolution CT Scanning. Acta Geologica Sinica, 88: 706–707.
USA (TL)
 
  • Utah
    • Utah Co.
      • East Tintic Mts
        • East Tintic District
AM 53 (1968), 1791; HB1 (1990); Am Min 53:1791-1798
Mineral and/or Locality  
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