Perroudite
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About Perroudite
Formula:
Hg5Ag4S5(I,Br)2Cl2
Colour:
Bright red
Lustre:
Adamantine, Vitreous
Hardness:
2
Specific Gravity:
6.6 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by H. Sarp, W.D. Birch, P.F. Hlava, A. Pring, D.K. Sewell, and E.H. Nickel in 1987 in honor of Pierre Perroud (3 November 1943, Geneva, Switzerland - ) Professor at Collège Voltaire, Geneva, Switzerland, for his work on Cap Garonne minerals. Perroud also developed the first online mineral database, Athena.
Classification of Perroudite
Approved
Approval year:
1986
First published:
1987
2/F.13-20
2.FC.20c
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
2.15.5.1
2 : SULFIDES
15 : Chlor-sulfides
2 : SULFIDES
15 : Chlor-sulfides
6.5.7
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
Physical Properties of Perroudite
Adamantine, Vitreous
Transparency:
Transparent
Colour:
Bright red
Streak:
Reddish-orange
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{100}
{100}
Density:
6.6 g/cm3 (Calculated)
Optical Data of Perroudite
Type:
Biaxial (+)
RI values:
nα = 2.300 nβ = 2.400
2V:
Measured: 70°
Max Birefringence:
δ = 2.300

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v very strong
Pleochroism:
Strong
Comments:
X= dark brownish red
Y= Yellow
Z= brownish-yellow
Y= Yellow
Z= brownish-yellow
Chemical Properties of Perroudite
Formula:
Hg5Ag4S5(I,Br)2Cl2
IMA Formula:
Ag4Hg5S5(I,Br)2Cl2
Crystallography of Perroudite
Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 2
Cell Parameters:
a = 17.47 Å, b = 12.23 Å, c = 4.29 Å
Ratio:
a:b:c = 1.428 : 1 : 0.351
Unit Cell V:
917.5 ų
Morphology:
Prismatic
Twinning:
contact twinned 0hl?
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0001135 | Perroudite | Mumme W G, Nickel E H (1987) Crystal structure and crystal chemistry of perroudite: A mineral from Coppin Pool, Western Australia American Mineralogist 72 1257-1262 | ![]() | 1987 | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Geological Setting:
Supergene zone
Type Occurrence of Perroudite
General Appearance of Type Material:
Fibrous tufted aggregates
Place of Conservation of Type Material:
Natural History Museum, Geneva, Switzerland.
Geological Setting of Type Material:
Oxidation zone of copper lead mine.
Synonyms of Perroudite
Other Language Names for Perroudite
Common Associates
Associated Minerals Based on Photo Data:
18 photos of Perroudite associated with Capgaronnite | AgHgClS |
8 photos of Perroudite associated with Olivenite | Cu2(AsO4)(OH) |
7 photos of Perroudite associated with Iltisite | HgAgSCl |
2 photos of Perroudite associated with Zincolivenite | CuZn(AsO4)(OH) |
2 photos of Perroudite associated with Conichalcite | CaCu(AsO4)(OH) |
2 photos of Perroudite associated with Quartz | SiO2 |
1 photo of Perroudite associated with Corkite | PbFe3(PO4)(SO4)(OH)6 |
1 photo of Perroudite associated with Sulphur | S8 |
1 photo of Perroudite associated with Arsentsumebite | Pb2Cu(AsO4)(SO4)(OH) |
1 photo of Perroudite associated with Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 |
Related Minerals - Nickel-Strunz Grouping
2.FC. | Demicheleite-(I) | BiSI | Orth. mmm (2/m 2/m 2/m) : Pnma |
2.FC.05 | Djerfisherite | K6(Fe,Cu,Ni)25S26Cl | Iso. m3m (4/m 3 2/m) : Pm3m |
2.FC.05 | Thalfenisite | Tl6(Fe,Ni,Cu)25S26Cl | Iso. |
2.FC.05 | Owensite | (Ba,Pb)6(Cu,Fe,Ni)25S27 | Iso. m3m (4/m 3 2/m) : Pm3m |
2.FC.10 | Bartonite | K6Fe20S26S | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
2.FC.10 | Chlorbartonite | K6Fe24S26(Cl,S) | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
2.FC.15a | Arzakite | Hg2+3S2(Br,Cl)2 | Mon. |
2.FC.15a | Corderoite | Hg2+3S2Cl2 | Iso. m3 (2/m 3) |
2.FC.15c | Grechishchevite | Hg2+3S2(Br,Cl,I)2 | Tet. |
2.FC.15a | Lavrentievite | Hg2+3S2(Cl,Br)2 | Mon. |
2.FC.15d | Radtkeite | Hg2+3S2ICl | Mon. 2/m : B2/m |
2.FC.15b | Kenhsuite | Hg2+3S2Cl2 | Orth. |
2.FC.20a | Capgaronnite | AgHgClS | Orth. |
2.FC.20b | Iltisite | HgAgSCl | Hex. |
2.FC.25 | Demicheleite-(Br) | BiSBr | Orth. mmm (2/m 2/m 2/m) : Pnma |
2.FC.25 | Demicheleite-(Cl) | BiSCl | Orth. mmm (2/m 2/m 2/m) : Pnma |
Related Minerals - Hey's Chemical Index of Minerals Grouping
6.5.1 | Corderoite | Hg2+3S2Cl2 | Iso. m3 (2/m 3) |
6.5.2 | Arzakite | Hg2+3S2(Br,Cl)2 | Mon. |
6.5.3 | Lavrentievite | Hg2+3S2(Cl,Br)2 | Mon. |
6.5.4 | Grechishchevite | Hg2+3S2(Br,Cl,I)2 | Tet. |
6.5.5 | Radtkeite | Hg2+3S2ICl | Mon. 2/m : B2/m |
6.5.6 | Capgaronnite | AgHgClS | Orth. |
6.5.8 | Ardaite | Pb19Sb13S35Cl7 | Mon. |
6.5.9 | Dadsonite | Pb23Sb25S60Cl | Tric. 1 : P1 |
6.5.10 | Radhakrishnaite | PbTe3(Cl,S)2 | Tet. |
6.5.11 | Djerfisherite | K6(Fe,Cu,Ni)25S26Cl | Iso. m3m (4/m 3 2/m) : Pm3m |
6.5.12 | Thalfenisite | Tl6(Fe,Ni,Cu)25S26Cl | Iso. |
Other Information
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 Perroudite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sarp, H., Birch, W.D., Hlava, P.F., Pring, A., Sewell, D.K., Nickel, E.H. (1987) Perroudite, a new sulfide-halide of Hg and Ag from Cap-Garonne, Var, France, and from Broken Hill, New South Wales, and Coppin Pool, Western Australia. American Mineralogist: 72: 1251-1256.
Mumme, W.G., Nickel, E.H. (1987) Crystal structure and crystal chemistry of perroudite: A mineral from Coppin Pool, Western Australia. American Mineralogist: 72: 1257-1262.
Keller, P., Lissner, F., Schleid, Th. (2005) Single-crystal structure determination of perroudite, Hg5Ag4S5(I,Br)2Cl2, from Tsumeb (Namibia), and its structural relationships to other sulfide halides of mercury and cinnabar. Neues Jahrbuch für Mineralogie - Abhandlungen: 181: 1-9.
Internet Links for Perroudite
mindat.org URL:
https://www.mindat.org/min-3169.html
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Localities for Perroudite
Locality List




All localities listed without proper references should be considered as questionable.
Australia | |
| Am.Min.72: 1251-1256 (1987) |
| Nickel, E.H., Gartrell, B.J. (1993) Secondary Minerals of Ashburton Downs Western Australia, Mineralogical Record (May-June 1993) 24:3: 203-218. |
Nickel, E. H. & Gartrell, B. J. (1993): Secondary Minerals from Ashburton Downs, Western Australia. Mineralogical Record 24, 203-216, 218. | |
| J.Earth Sci. 32(3),311-321 (1985); Am.Min.72: 1251-1256 (1987) |
Chile | |
| SEM-EDS by Stefan Diller |
| Kampf, A.R., Steele, I.M., Jenkins, R.A. (2006) Phosphohedyphane, Ca2Pb3(PO4)3Cl, the phosphate analog of hedyphane: Description and crystal structure. American Mineralogist, 91(11-12), 1909-1917. |
| Maurizio Dini & Robert Jenkins collections; material analysed by Dr. Jochen Schluter |
France (TL) | |
| Sarp, H., Birch, W.D., Hlava, P.F., Pring, A., Sewell, D.K.B., and Nickel, E.H. (1987) Perroudite, a new sulfide-halide of Hg and Ag from Cap Garonne, Var, France and from Broken Hill, New South Wales, and Coppin Pool, Western Australia. American Mineralogist: 72: 1251-1256. Jambor, J.L. and Roberts, A.C. (1998) New mineral names. American Mineralogist: 83: 400-403. |
Georges FAVREAU collection | |
Germany | |
| Lapis 2001(6), 40 |
| Lapis 2001(6), 13-40 |
Witzke, T. & Hensel, H. (2000) | |
| Schnorrer, G., (1993): Mineralogische Notitzen VI, Der Aufschluss, Vol. 44, 44-58; N.V. Chukanov, R.K. Rastsvetaeva, S.M. Aksenov, I.V. Pekov, D.I. Belakovskiy, G. Blass, and G. Mohn (2013) Lahnsteinite, Zn4(SO4)(OH)6•3H2O, a new mineral species from the Friederichssegen Mine, Germany. Zap. Ross. Mineral. Obshch., 142, 39-46 (in Russian, English abstract). [Engl. transl.: Geology of Ore Deposits, 55, 663-668.] |
| Krause, W., (1988): Perroudit und Karminit von der Grube "Schöne Aussicht" bei Dernbach, Der Aufschluss, Vol. 39, 169-175 |
Hungary | |
| Szakáll: Minerals of Rudabánya, 2001 |
Indonesia | |
| Mineralium Deposita (2005) 40: 76–99 |
Namibia | |
| • Keller, P., Lissner, F., Thomas Schleid, Th. (2005): Single-crystal structure determination of perroudite, Hg5Ag4S5(I,Br)2Cl2, from Tsumeb (Namibia), and its structural relationships to other sulfide halides of mercury and cinnabar. Neues Jahrbuch für Mineralogie - Abhandlungen, 181, 1-9. |
Russia | |
| P.M. Kartashov data |
Slovakia | |
| Koděra, P., Rojkovičová, Ľ.,Košárková, M., 1998: Mineralógická správa lokality Byšta, Au-Ag. Manuscript, Archiv Geofond, Bratislava, 68 p |
Spain | |
| Georges Favreau collection |
| Calvo Sevillano, G., Calvo, M. y Viñals, J. (2011). Presencia en localidades españolas de perroudita, Hg5Ag4S5(I,Br)2Cl, un mineral "raro" que es probablemente frecuente. Macla, (15), 45-46. |
| Bocamina, (4), (1999) 50-86. |
| Calvo Sevillano, G., Calvo, M. and Viñals, J. (2011). Presencia en localidades españolas de perroudita, Hg5Ag4S5(I,Br)2Cl, un mineral "raro" que es probablemente frecuente. Macla, (15), 45-46. |
| Viñals, J. y Calvo, M. (2007): Corderoíta, Kenhsuíta, y Perroudita. Sulfohalogenuros de Mercurio de Chóvar, Castellón. Revista de Minerales. 3(3):46-49. Barcelona |
USA | |
| Southern California Micromounters Symposium 29 Jan 2010, Redlands, CA |
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France