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Billingsleyite

A valid IMA mineral species
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About BillingsleyiteHide

05566730015612488665497.jpg
Paul Billingsley
Formula:
Ag7AsS6
Colour:
Dark lead-grey
Lustre:
Metallic
Hardness:
Specific Gravity:
5.92
Crystal System:
Isometric
Name:
Named in honor of Paul Billingsley (1887, New York City, New York, USA - 18 May 1962), geologist with the Anaconda company, who discovered the North Lily mine and collected the first specimens in 1930.
This page provides mineralogical data about Billingsleyite.


Unique IdentifiersHide

Mindat ID:
675
Long-form identifier:
mindat:1:1:675:4
GUID
(UUID V4):
b300c437-87ed-418c-9261-145f11bf28ee

IMA Classification of BillingsleyiteHide

Classification of BillingsleyiteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
BgyIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

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)

Chemistry of BillingsleyiteHide

Mindat 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).
Comment:
Originally assumed to be orthorhombic, with space group C2221 (Frondel and Honea, 1968).

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006324BillingsleyiteBindi L, Downs R T, Menchetti S (2010) The crystal structure of billingsleyite, Ag7(As,Sb)S6, a sulfosalt containing As5+ The Canadian Mineralogist 48 155-1622010North Lily mine, East Tintic district, Utah, USA0293
0013828BillingsleyitePertlik 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 112 170-1751994synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

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

Synonyms of BillingsleyiteHide

Other Language Names for BillingsleyiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
20 photos of Billingsleyite associated with AcanthiteAg2S
16 photos of Billingsleyite associated with CalciteCaCO3
15 photos of Billingsleyite associated with DolomiteCaMg(CO3)2
8 photos of Billingsleyite associated with ProustiteAg3AsS3
7 photos of Billingsleyite associated with TrechmanniteAgAsS2
4 photos of Billingsleyite associated with PyrargyriteAg3SbS3
2 photos of Billingsleyite associated with MimetitePb5(AsO4)3Cl
2 photos of Billingsleyite associated with ArsendescloizitePbZn(AsO4)(OH)
2 photos of Billingsleyite associated with ChalcopyriteCuFeS2
1 photo of Billingsleyite associated with AustiniteCaZn(AsO4)(OH)

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.

Internet Links for BillingsleyiteHide

References 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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Lower Austria
    • Lilienfeld District
      • Annaberg
Kolitsch et al. (2017)
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Blaß et al. (2000) +1 other reference
Italy
 
  • Tuscany
    • Grosseto Province
      • Gavorrano
Rivista Mineralogica Italiana anno 2014 ...
Orlandi (2011)
    • Lucca Province
      • Pietrasanta
        • Valdicastello Carducci
Biagioni et al. (2014)
Japan
 
  • Hokkaidō Prefecture
    • Hiyama Subprefecture
      • Hiyama District
        • Kaminokuni
          • Johkoku mine (Jôkoku mine; Jokoku mine)
Ishiyama et al. (1989)
Mexico
 
  • Mexico
    • Temascaltepec Municipality
      • Temascaltepec de González (Temascaltepec)
Camprubi
Peru
 
  • Lima
    • Oyón Province
      • Oyón District
Frank Keutsch EDS- (Ag7AsS6, Sb-free)
Romania
 
  • Hunedoara County
    • Certeju de Sus
Andy Roberts
Russia
 
  • Magadan Oblast
Savva et al. (2007)
Turkey
 
  • Balikesir Province
    • Sindirgi District
Blanks et al. (2014)
USA
 
  • Idaho
    • Owyhee County
      • Silver City Mining District (Carson Mining District)
Collins (2012)
  • Utah
    • Utah County
      • East Tintic Mining District
Frondel et al. (1968) +1 other reference
 
Mineral and/or Locality  
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