Roshchinite
A valid IMA mineral species
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About Roshchinite
Formula:
Ag19Pb10Sb51S96
Colour:
Silver-gray, lead-gray
Lustre:
Metallic
Hardness:
2½ - 3½
Specific Gravity:
5.265
Crystal System:
Orthorhombic
Member of:
Name:
Named in honor of Yuri Vladimirovich Roshchin (Roschin) (Юрий Владимирович Рощин) (1934-1979), geologist and geochemist with the Central Kazakhstan Geological Administration, Karaganda, Kazakhstan.
This page provides mineralogical data about Roshchinite.
Unique Identifiers
Mindat ID:
3457
Long-form identifier:
mindat:1:1:3457:5
IMA Classification of Roshchinite
Approved
IMA Formula:
(Ag1+,Cu1+)19Pb2+10Sb3+51S2-96
Approval year:
1989
First published:
1990
Classification of Roshchinite
2.JB.40a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb
3.4.15.7
3 : SULFOSALTS
4 : ø = 3
3 : SULFOSALTS
4 : ø = 3
5.7.24
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rch | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Roshchinite
Metallic
Transparency:
Opaque
Colour:
Silver-gray, lead-gray
Streak:
Pale steel-gray
Hardness:
2½ - 3½ on Mohs scale
Hardness:
VHN15=95 kg/mm2 - Vickers
Tenacity:
Very brittle
Density:
5.265(15) g/cm3 (Measured) 5.263 g/cm3 (Calculated)
Optical Data of Roshchinite
Anisotropism:
Nearly isotropic in cross section
Bireflectance:
Weak and only seen on prismatic sections
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 36.9% | 40.3% |
| 440nm | 37.0% | 40.5% |
| 480nm | 36.6% | 40.3% |
| 520nm | 36.3% | 40.2% |
| 560nm | 35.7% | 39.7% |
| 600nm | 35.0% | 38.9% |
| 640nm | 34.4% | 38.0% |
| 680nm | 33.6% | 37.0% |
| 700nm | 33.0% | 36.3% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 40.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
silver-white with weak blue tint
Chemistry of Roshchinite
Mindat Formula:
Ag19Pb10Sb51S96
Element Weights:
Elements listed:
Common Impurities:
Cu,Zn,Hg,Mn
Crystallography of Roshchinite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 12.946(19) Å, b = 19.048(10) Å, c = 16.932(12) Å
Ratio:
a:b:c = 0.68 : 1 : 0.889
Unit Cell V:
4,175.35 ų (Calculated from Unit Cell)
Z:
1
Morphology:
{100}, {210}, {110}, {230}, {010}, {111}, {221}, {252}, {201}, {031}, {041}, and {001}.
Comment:
Incommensurately modulated structure (Makovicky et al., 2018).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.24 Å | (60) |
| 2.85 Å | (80) |
| 2.70 Å | (60) |
| 1.866 Å | (50) |
| 1.765 Å | (100) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Roshchinite
General Appearance of Type Material:
Short, prismatic, partly rounded crystals measuring 0.5 to 4 mm.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia.
Mining Museum, St. Petersburg, Russia.
Mining Museum, St. Petersburg, Russia.
Associated Minerals at Type Locality:
Synonyms of Roshchinite
Other Language Names for Roshchinite
Relationship of Roshchinite to other Species
Member of:
Other Members of Lillianite Homologous Series:
| Andreadiniite | CuHgAg7Pb7Sb24S48 | Mon. 2/m : P21/b |
| Arsenquatrandorite | Ag17.6Pb12.8Sb38.1As11.5S96 | Mon. 2/m : P21/b |
| Aschamalmite | Pb6-3xBi2+xS9 | Mon. 2/m : B2/m |
| Baiamareite | Ag4Pb12Fe4Sb20S48 | Mon. 2/m |
| Brusnitsynite | Mn3CuPbAs3Sb2S12 | Mon. 2/m : P21/b |
| Clino-oscarkempffite | Ag15Pb6Sb21Bi18S72 | Mon. 2/m : P21/b |
| Erzwiesite | Ag8Pb12Bi16S40 | Orth. mmm(2/m2/m2/m) : Cmcm |
| Eskimoite | Ag7Pb10Bi15S36 | Mon. |
| Fizélyite | Ag5Pb14Sb21S48 | Mon. 2/m |
| Gustavite | AgPbBi3S6 | Orth. mmm(2/m2/m2/m) |
| Heyrovskýite | Pb6Bi2S9 | Orth. mmm(2/m2/m2/m) : Cccm |
| Holubite | Ag3Pb6(Sb8Bi3)S24 | Mon. 2/m |
| Jasrouxite | Ag16Pb4(Sb25As15)S72 | Tric. 1 : P1 |
| Lasmanisite | Ag12Pb13Mn11Sb44S96 | Orth. 222 : P212121 |
| Lazerckerite | Ag3.75Pb4.50(Sb7.75Bi4)S24 | Mon. 2/m : P21/b |
| Lillianite | Pb3-2xAgxBi2+xS6 | Orth. mmm(2/m2/m2/m) |
| Menchettiite | AgPb2.40Mn1.60Sb3As2S12 | Mon. 2/m : P21/b |
| Oscarkempffite | Ag10Pb4(Sb17Bi9)S48 | Orth. mm2 |
| Ourayite | Ag3Pb4Bi5S13 | Orth. |
| Oyonite | Ag3Mn2Pb4Sb7As4S24 | Mon. 2/m |
| Quatrandorite | AgPbSb3S6 | Mon. 2/m : P21/b |
| Ramdohrite | Pb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24 | Mon. 2/m |
| 'Schirmerite' | PbAgBi3S6 - Pb3Ag1.5Bi3.5S9 | Orth. |
| Senandorite | AgPbSb3S6 | Orth. mm2 : Pmn21 |
| Staročeskéite | Ag0.70Pb1.60(Bi1.35Sb1.35)Σ2.70S6 | Orth. mmm(2/m2/m2/m) : Cmcm |
| Tarutinoite | Ag3Pb7Bi7S19 | Mon. 2/m : B2/m |
| Terrywallaceite | AgPb(Sb,Bi)3S6 | Mon. 2/m : P21/b |
| Treasurite | Ag7Pb6Bi15S32 | Mon. |
| Uchucchacuaite | AgMnPb3Sb5S12 | Orth. mmm(2/m2/m2/m) : Pmmm |
| Ustarasite | Pb(Bi,Sb)6S10 (?) | |
| Vikingite | Ag5Pb8Bi13S30 | Mon. 2/m : B2/m |
| Xilingolite | Pb3Bi2S6 | Mon. |
Related Minerals - Strunz-mindat Grouping
| 2.JB. | Clino-oscarkempffite | Ag15Pb6Sb21Bi18S72 |
| 2.JB. | Arsenquatrandorite | Ag17.6Pb12.8Sb38.1As11.5S96 |
| 2.JB. | Ginelfite | Ag2(Ag0.5Fe)TlPb23.5(Sb,As)33.5S76 |
| 2.JB. | Andreadiniite | CuHgAg7Pb7Sb24S48 |
| 2.JB. | Chukotkaite | AgPb7Sb5S15 |
| 2.JB. | Selenojunoite | Cu2Pb3Bi8Se16 |
| 2.JB. | Lechnerite | Ag10Cu4HgPb33Sb58S128 |
| 2.JB. | Cuprosenandorite | Ag16Cu8Pb24Sb72S144 |
| 2.JB. | Morleyite | Ag2CuPb25Sb24As4S68.5 |
| 2.JB. | Lazerckerite | Ag3.75Pb4.50(Sb7.75Bi4)S24 |
| 2.JB. | Lasmanisite | Ag12Pb13Mn11Sb44S96 |
| 2.JB. | Montpelvouxite | AgPb16Sb27As18S84 |
| 2.JB. | Senandorite | AgPbSb3S6 |
| 2.JB. | Oscarkempffite | Ag10Pb4(Sb17Bi9)S48 |
| 2.JB.05 | Diaphorite | Ag3Pb2Sb3S8 |
| 2.JB.10 | Cosalite | Pb2Bi2S5 |
| 2.JB.15 | Marrite | AgPbAsS3 |
| 2.JB.15 | Freieslebenite | AgPbSbS3 |
| 2.JB.20 | Cannizzarite | Pb48Bi56S132 |
| 2.JB.20 | Wittite | Pb9Bi12(S,Se)27 |
| 2.JB.25j | Rouxelite | Cu2HgPb23Sb27S65.5 |
| 2.JB.25i | Neyite | Ag2Cu6Pb25Bi26S68 |
| 2.JB.25a | Junoite | Cu2Pb3Bi8(S,Se)16 |
| 2.JB.25f | Ángelaite | Cu2AgPbBiS4 |
| 2.JB.25e | Galenobismutite | PbBi2S4 |
| 2.JB.25c | Nordströmite | CuPb3Bi7(Se4S10) |
| 2.JB.25i | Cuproneyite | Cu7Pb27Bi25S68 |
| 2.JB.25g | Nuffieldite | Cu1.4Pb2.4Bi2.4Sb0.2S7 |
| 2.JB.25h | Weibullite | Pb5Bi8Se7S11 |
| 2.JB.25d | Proudite | CuPb7.5Bi9.33(S,Se)22 |
| 2.JB.25b | Felbertalite | Cu2Pb6Bi8S19 |
| 2.JB.30a | Jordanite | Pb14As6S23 |
| 2.JB.30a | Geocronite | Pb14Sb6S23 |
| 2.JB.30a | Arsenmarcobaldiite | Pb12(As3.2Sb2.8)Σ6S21 |
| 2.JB.30b | Kirkiite | Pb10Bi3As3S19 |
| 2.JB.30c | Tsugaruite | Pb28As15S50Cl |
| 2.JB.30a | Marcobaldiite | Pb12(Sb3As2Bi)Σ6S21 |
| 2.JB.35d | Pellouxite | (Cu,Ag)Pb10Sb12S27O(Cl,S)0.6 |
| 2.JB.35e | Chovanite | Pb15-2xSb14+2xS36Ox (x ~ 0.2) |
| 2.JB.35a | Zinkenite | Pb9Sb22S42 |
| 2.JB.35c | Pillaite | Pb9Sb10S23ClO0.5 |
| 2.JB.35b | Scainiite | Pb14Sb30S54O5 |
| 2.JB.35f | Tubulite | Ag2Pb22Sb20S53 |
| 2.JB.40a | Fizélyite | Ag5Pb14Sb21S48 |
| 2.JB.40a | Ramdohrite | Pb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24 |
| 2.JB.40e | Ustarasite | Pb(Bi,Sb)6S10 (?) |
| 2.JB.40a | 'Bursaite' | Pb5Bi4S11 (?) |
| 2.JB.40 | 'UM1988-05-S:AgBiCuHgPb' | (Hg,Ag,Cu,Pb)5Pb5Bi11S27 |
| 2.JB.40 | 'UM1988-06-S:AgBiCuHgPb' | (Pb,Hg)12(Cu,Ag)3(Bi,Sb)10(S,Te)27 |
| 2.JB.40a | Terrywallaceite | AgPb(Sb,Bi)3S6 |
| 2.JB.40a | Jasrouxite | Ag16Pb4(Sb25As15)S72 |
| 2.JB.40a | Tarutinoite | Ag3Pb7Bi7S19 |
| 2.JB.40a | Oyonite | Ag3Mn2Pb4Sb7As4S24 |
| 2.JB.40b | Heyrovskýite | Pb6Bi2S9 |
| 2.JB.40a | Quatrandorite | AgPbSb3S6 |
| 2.JB.40a | Erzwiesite | Ag8Pb12Bi16S40 |
| 2.JB.40a | Vikingite | Ag5Pb8Bi13S30 |
| 2.JB.40a | Lillianite | Pb3-2xAgxBi2+xS6 |
| 2.JB.40b | Baiamareite | Ag4Pb12Fe4Sb20S48 |
| 2.JB.40a | Staročeskéite | Ag0.70Pb1.60(Bi1.35Sb1.35)Σ2.70S6 |
| 2.JB.40b | Aschamalmite | Pb6-3xBi2+xS9 |
| 2.JB.40b | Eskimoite | Ag7Pb10Bi15S36 |
| 2.JB.40a | Menchettiite | AgPb2.40Mn1.60Sb3As2S12 |
| 2.JB.40a | Holubite | Ag3Pb6(Sb8Bi3)S24 |
| 2.JB.40a | Brusnitsynite | Mn3CuPbAs3Sb2S12 |
| 2.JB.40a | Treasurite | Ag7Pb6Bi15S32 |
| 2.JB.40c | Ourayite | Ag3Pb4Bi5S13 |
| 2.JB.40a | Uchucchacuaite | AgMnPb3Sb5S12 |
| 2.JB.40d | 'Schirmerite' | PbAgBi3S6 - Pb3Ag1.5Bi3.5S9 |
| 2.JB.40a | Xilingolite | Pb3Bi2S6 |
| 2.JB.40a | Gustavite | AgPbBi3S6 |
| 2.JB.55 | Gratonite | Pb9As4S15 |
| 2.JB.60 | Marrucciite | Hg3Pb16Sb18S46 |
| 2.JB.65 | Vurroite | Pb20Sn2(Bi,As)22S54Cl6 |
| 2.JB.65 | Tazieffite | Pb20Cd2(As,Bi)22S50Cl10 |
| 2.JB.70 | Daliranite | PbHgAs2S5 |
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.
Internet Links for Roshchinite
mindat.org URL:
https://www.mindat.org/min-3457.html
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References for Roshchinite
Reference List:
Localities for Roshchinite
Showing 5 localities.
Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Bolivia | |
| Kempff et al. (La Paz, 2009) +1 other reference |
Hungary | |
| Papp et al. (2022) |
Kazakhstan (TL) | |
| DAN-SSSR (1990) +3 other references |
Russia | |
| Kasatkin et al. (2020) +1 other reference |
Senegal | |
| Randgold Resources |
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Kvartsitovje Gorki gold deposit, Aksu, Stepnogorsk, Akmola Region, Kazakhstan