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Pyrargyrite

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Formula:
Ag
 
3
SbS
 
3
System:TrigonalColour:Deep red or red gray
Lustre:AdamantineHardness:
Name:From the Greek, pyr and argyros, "fire-silver" in allusion to its color and silver content.
Dimorph of:Pyrostilpnite


Proustite Group. Proustite-Pyrargyrite Series.
Trigonal dimorph of Pyrostilpnite.

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Classification of Pyrargyrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/E.07-20
Nickel-Strunz 10th (pending) edition ID:2.GA.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
Dana 8th edition ID:3.4.1.2

3 : SULFOSALTS
4 : ø = 3
Hey's CIM Ref.:5.2.9

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

Geological Setting:Hydrothermal veins as a late stage, low temperature mineral; also formed by secondary processes.

Physical Properties of Pyrargyrite

Lustre:Adamantine
Diaphaneity (Transparency):Translucent
Comment:Darkens with exposure to light
Colour:Deep red or red gray
Streak:Purplish red
Hardness (Mohs):
Tenacity:Brittle
Cleavage:Distinct/Good
Distinct on {1011} very imperfect on {0112}
Fracture:Irregular/Uneven, Conchoidal
Density (measured):5.82 g/cm3
Density (calculated):5.855 g/cm3

Crystallography of Pyrargyrite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3c
Cell Parameters:a = 11.047Å, c = 8.719Å
Ratio:a:c = 1 : 0.789
Unit Cell Volume:V 921.48 ų (Calculated from Unit Cell)
Z:6
Morphology:Prismatic crystals
Twinning:On {1014}, less commonly on {1011}{1120} rarely {0120}
Crystal Atlas:
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Pyrargyrite no.8 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Pyrargyrite

Type:Uniaxial (-)
RI values: nω = 3.084 nε = 2.881
Maximum Birefringence:δ = 0.203

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Type:Anisotropic
Anisotropism:Strong in yellow white and grey blue
Pleochroism:Weak

Chemical Properties of Pyrargyrite

Formula:
Ag
 
3
SbS
 
3
Simplified for copy/paste:Ag3SbS3
Essential elements:Ag, S, Sb
All elements listed in formula:Ag, S, Sb
Common Impurities:As

Relationship of Pyrargyrite to other Species

Series:Forms a series with Proustite (see here)
Structurally related to group(s):
Proustite Group
Related Minerals - Nickel-Strunz Grouping):

- +
2.GA.05Proustite
Ag
 
3
AsS
 
3
2.GA.10Pyrostilpnite
Ag
 
3
SbS
 
3
2.GA.10Xanthoconite
Ag
 
3
AsS
 
3
2.GA.15Samsonite
Ag
 
4
MnSb
 
2
S
 
6
2.GA.20Skinnerite
Cu
 
3
SbS
 
3
2.GA.20Wittichenite
Cu
 
3
BiS
 
3
2.GA.25Lapieite
NiCuSbS
 
3
2.GA.25Mückeite
NiCu(Bi,Sb)S
 
3
2.GA.25Malyshevite
PdCuBiS
 
3
2.GA.25Lisiguangite
PtCuBiS
 
3
2.GA.30Aktashite
Cu
 
6
Hg
 
3
As
 
4
S
 
12
2.GA.30Gruzdevite
Cu
 
6
Hg
 
3
Sb
 
4
S
 
12
2.GA.30Nowackiite
Cu
 
6
Zn
 
3
As
 
4
S
 
12
2.GA.35Laffittite
AgHgAsS
 
3
2.GA.40Routhiérite
Tl(Cu,Ag)(Hg,Zn)
 
2
(As,Sb)
 
2
S
 
6
2.GA.40Stalderite
Tl(Cu,Ag)(Zn,Fe,Hg)
 
2
(As,Sb)
 
2
S
 
6
2.GA.45Erniggliite
Tl
 
2
SnAs
 
2
S
 
6
2.GA.50Bournonite
PbCuSbS
 
3
2.GA.50Seligmannite
PbCuAsS
 
3
2.GA.50Součekite
PbCuBi(S,Se)
 
3
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
 
6
[Cu
 
4
(Fe,Zn)
 
2
]As
 
4
S
 
13
5.2.8Miargyrite
AgSbS
 
2
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
]
5.2.13Billingsleyite
Ag
 
7
AsS
 
6
5.2.14Polybasite-Tac
5.2.15Freibergite
Ag
 
6
[Cu
 
4
Fe
 
2
]Sb
 
4
S
 
13-x
5.2.16Aramayoite
Ag(Sb,Bi)S
 
2
5.2.17Matildite
AgBiS
 
2
5.2.18Schapbachite
Ag
 
0.4
Pb
 
0.2
Bi
 
0.4
S
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 Pyrargyrite

Synonyms:
AerositeAntimonial Red SilverAntimonial Silver BlendeArgyrythroseDark Red Silver Ore
Red Silver Ore
Other Languages:
French:Argent antimonié sulfuré
Argent rouge antimoniale
Mine d'argent rouge
German:Aerosit
Antimonrotgülden
Antimon-Rothgültigerz
Antimonsilberblende
Dunkles Rotgültigerz
Gemein Rothguldenerz
Pyrargirit
Pyrargyrit
Rothgolderz
Italian:Argento rosso antimoniale
Pirargirite
Russian:Пираргирит
Simplified Chinese:浓红银矿
深红银矿
硫锑银矿
Spanish:Aerosita
Petlanque
Pirargirita
Pyrargyrita
Rosicler oscuro
Swedish:Rothgylden

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 Pyrargyrite

Reference List:

- +
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 362-366.

Neues Jahrbuch für Mineralogie, Monatshefte (1966): 181-184.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (1990) Handbook of Mineralogy, Volume I. Elements, Sulfides, Sulfosalts. Mineral Data Publishing, Tucson, AZ, 588pp.: 425.

Harlov, D.E. (1999): Thermochemistry of Ag-Cu exchange equilibria between proustite, sinnerite, and pearceite; constraints on Ag-Cu and As-Sb mixing in pyrargyrite-proustite. European Journal of Mineralogy, 11, 709-719.

Laufek, F.; Sejkora, J.; Dušek, M. (2010): The role of silver in the crystal structure of pyrargyrite: single crystal X-ray diffraction study. Journal of Geosciences, 55, 161-167.

Mindat.org articles about Pyrargyrite

Article entries:
Pyrargyrite from Ratibořské HoryRobert Vaňo
PyrargyriteAlan Melbourne

Internet Links for Pyrargyrite

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  • Raman and XRD data at RRUFF project
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  • Pyrargyrite details from Handbook of Mineralogy (PDF)
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    Localities for Pyrargyrite

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