Nagyágite
A valid IMA mineral species - grandfathered
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About Nagyágite
Formula:
[Pb3(Pb,Sb)3S6](Au,Te)3
Colour:
Black-grey
Lustre:
Metallic
Hardness:
1 - 1½
Specific Gravity:
7.35 - 7.49
Crystal System:
Monoclinic
Name:
After the Hungarian name (Nagyág) of the type locality (Săcărâmb, Romania).
Type Locality:
Unique Identifiers
Mindat ID:
2830
Long-form identifier:
mindat:1:1:2830:7
IMA Classification of Nagyágite
Approved, 'Grandfathered' (first described prior to 1959)
Classification of Nagyágite
2.HB.20a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
B : With Cu, Ag, Fe, Sn and Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
B : With Cu, Ag, Fe, Sn and Pb
2.11.10.1
2 : SULFIDES
11 : AmBnXp, with (m+n):p = 2:3
2 : SULFIDES
11 : AmBnXp, with (m+n):p = 2:3
5.3.1
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
3 : Sulpharsenites etc. of Au
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
3 : Sulpharsenites etc. of Au
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Ngy | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Ngy | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Nagyágite
Metallic
Transparency:
Opaque
Colour:
Black-grey
Streak:
Blackish lead-grey
Hardness:
1 - 1½ on Mohs scale
Hardness:
VHN100=60 - 94 kg/mm2 - Vickers
Tenacity:
Flexible
Cleavage:
Perfect
Perfect on {010}, excellent on {101}.
Perfect on {010}, excellent on {101}.
Density:
7.35 - 7.49 g/cm3 (Measured) 7.29 g/cm3 (Calculated)
Optical Data of Nagyágite
Anisotropism:
Weak but distinct
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 46.4% | 48.4% |
| 420nm | 45.4% | 47.4% |
| 440nm | 44.5% | 46.7% |
| 460nm | 43.6% | 45.9% |
| 480nm | 42.9% | 45.1% |
| 500nm | 42.1% | 44.2% |
| 520nm | 41.3% | 43.3% |
| 540nm | 40.5% | 42.4% |
| 560nm | 39.8% | 41.6% |
| 580nm | 39.2% | 40.9% |
| 600nm | 38.7% | 40.3% |
| 620nm | 38.3% | 39.8% |
| 640nm | 37.8% | 39.2% |
| 660nm | 37.2% | 38.6% |
| 680nm | 36.6% | 37.8% |
| 700nm | 36.0% | 37.2% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 48.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale grey
Pleochroism:
Weak
Chemistry of Nagyágite
Mindat Formula:
[Pb3(Pb,Sb)3S6](Au,Te)3
Common Impurities:
Ag,Fe,Bi
Crystallography of Nagyágite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 4.220(1) Å, b = 4.176(1) Å, c = 15.119(3) Å
β = 95.42(3)°
β = 95.42(3)°
Ratio:
a:b:c = 1.011 : 1 : 3.62
Unit Cell V:
265.25 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Thin {010} tabular crystals, commonly bent. Also granular.
Twinning:
Multiple twinning on (001).
Comment:
Pseudo-tetragonal/orthorhombic
Crystallographic forms of Nagyágite
Crystal Atlas:
Image Loading
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Nagyagite no.2 - Goldschmidt (1913-1926)
Nagyagite no.5 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by
www.smorf.nl.
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Edge Lines | Miller Indices | Axes
Transparency
Opaque | Translucent | Transparent
View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
Toggle
Edge Lines | Miller Indices | Axes
Transparency
Opaque | Translucent | Transparent
View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.023 Å | (100) |
| 2.829 Å | (80) |
| 2.431 Å | (40) |
| 2.081 Å | (50) |
| 1.823 Å | (30) |
| 1.710 Å | (30) |
| 1.511 Å | (40) |
| 1.473 Å | (30) |
Comments:
Săcărâmb (Nagyág), Romania (ICDD 00-047-1755).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
In Au–Te-bearing epithermal hydrothermal veins.
Type Occurrence of Nagyágite
Associated Minerals at Type Locality:
Synonyms of Nagyágite
Other Language Names for Nagyágite
Common Associates
Associated Minerals Based on Photo Data:
| 115 photos of Nagyágite associated with Rhodochrosite | MnCO3 |
| 89 photos of Nagyágite associated with Quartz | SiO2 |
| 38 photos of Nagyágite associated with Native Tellurium | Te |
| 36 photos of Nagyágite associated with Calaverite | AuTe2 |
| 27 photos of Nagyágite associated with Sphalerite | ZnS |
| 16 photos of Nagyágite associated with Pyrite | FeS2 |
| 12 photos of Nagyágite associated with Native Gold | Au |
| 7 photos of Nagyágite associated with Sylvanite | AgAuTe4 |
| 4 photos of Nagyágite associated with Dolomite | CaMg(CO3)2 |
| 4 photos of Nagyágite associated with Calcite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 2.HB. | Barikaite | Ag3Pb10(Sb8As11)S40 |
| 2.HB. | Carducciite | (Ag2Sb2)Pb12(As,Sb)16S40 |
| 2.HB. | Sardashtite | Ag9Cu2.5Pb41Sb36.5As7S112 |
| 2.HB. | Interliveingite | AgPb18As25S56 |
| 2.HB. | Reckibachite | Ag2Pb12As14Sb4S40 |
| 2.HB.05a | Salzburgite | Pb1.6Cu1.6Bi6.4S12 |
| 2.HB.05a | Hammarite | Pb2Cu2Bi4S9 |
| 2.HB.05c | Jaskólskiite | CuxPb2+x(Sb,Bi)2-xS5 (x ~ 0.15) |
| 2.HB.05 | UM1990-54-Se:BiCuPb | CuPb(Ni,Co)0.3Bi3Se6 |
| 2.HB.05a | Aikinite | PbCuBiS3 |
| 2.HB.05a | Pekoite | PbCuBi11S18 |
| 2.HB.05a | Friedrichite | Pb5Cu5Bi7S18 |
| 2.HB.05b | Meneghinite | Pb13CuSb7S24 |
| 2.HB.05a | Paarite | Pb1.7Cu1.7Bi6.3S12 |
| 2.HB.05a | Lindströmite | Pb3Cu3Bi7S15 |
| 2.HB.05a | Emilite | Pb2.7Cu2.7Bi5.3S12 |
| 2.HB.05a | Gladite | PbCuBi5S9 |
| 2.HB.05a | Krupkaite | PbCuBi3S6 |
| 2.HB.05 | UM2000-46-S:BiCuPb | Cu0.33Pb0.33Bi7.67S12 |
| 2.HB.10b | Izoklakeite | Pb27(Cu,Fe,Ag)2(Sb,Bi)19S57 |
| 2.HB.10c | Eclarite | (Cu,Fe)Pb9Bi12S28 |
| 2.HB.10a | Tintinaite | Pb22Cu4(Sb,Bi)30S69 |
| 2.HB.10b | Giessenite | Pb27Cu2(Bi,Sb)19S57 |
| 2.HB.10a | Kobellite | Pb22Cu4(Bi,Sb)30S69 |
| 2.HB.15 | Jamesonite | Pb4FeSb6S14 |
| 2.HB.15 | Benavidesite | Pb4MnSb6S14 |
| 2.HB.20b | Buckhornite | AuPb2BiTe2S3 |
| 2.HB.20e | Luxembourgite | AgCuPbBi4Se8 |
| 2.HB.20b | Jaszczakite | [Bi3S3][AuS2] |
| 2.HB.20d | Berryite | Cu3Ag2Pb3Bi7S16 |
| 2.HB.20e | Watkinsonite | Cu2PbBi4(Se,S,Te)8 |
| 2.HB.20c | Museumite | [Pb2(Pb,Sb)2S8][(Te,Au)2] |
| 2.HB.20e | Litochlebite | Ag2PbBi4Se8 |
| 2.HB.25 | Meerschautite | (Ag,Cu)6Pb43-2xSb44+2xS112Ox (x ~0.5) |
Fluorescence of Nagyágite
none
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 Nagyágite
mindat.org URL:
https://www.mindat.org/min-2830.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Nagyágite
Reference List:
Klaproth, M. H. (1802) LLXXIII. Chemische Untersuchung der siebenbürgischen Golderze, D. Blättererz. In Beiträge zur chemischen Kenntniss der Mineralkörper Vol. 3. Rottmann. p.26-34.
Stumpfl, E. F. (1970) New electron probe and optical data on gold tellurides. American Mineralogist, 55 (5-6) 808-814
Effenberger, Herta, Paar, Werner H., Topa, Dan, Culetto, Franz J., Giester, Gerald (1999) Toward the crystal structure of nagyagite, [Pb(Pb,Sb)S2][(Au,Te)]. American Mineralogist, 84 (4) 669-676 doi:10.2138/am-1999-0420
Sung, Y.-H., Ciobanu, C. L., Pring, A., Brügger, J., Skinner, W., Cook, N. J., Nugus, M. (2007) Tellurides from Sunrise Dam gold deposit, Yilgarn Craton, Western Australia: a new occurrence of nagyágite. Mineralogy and Petrology, 91 (3) 249-270 doi:10.1007/s00710-007-0199-z
Localities for Nagyágite
symbol to view information about a locality.
The 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.
Argentina | |
| Raúl J. Tauber Larry´s collection |
| Anthony et al. (1990) +2 other references | |
Armenia | |
| Pavel M. Kartashov analytical data (2013) |
| Extra Lapis English No. 5 Gold +1 other reference |
| Kolpakova et al. (2001) +1 other reference | |
| Kukulyan (1988) |
Australia | |
| reflected light and SEM/EDS study |
| Noble (2017) |
| Simpson (1948) | |
| Simpson (1948) | |
| Simpson (1948) | |
| Noble (2017) | |
| Simpson (1948) | |
| Sung et al. (2007) +2 other references |
| Kalgoorlie Miner newspaper (1898) |
Austria | |
| Auer (1995) |
Azerbaijan | |
| - (2005) |
Bulgaria | |
| Cioacă et al. (2018) |
| Terziev (1966) +2 other references |
Canada | |
| R. P Rothwell (1898) +1 other reference |
| RIDLAND (1941) |
| RIDLAND (1941) | |
| Dana 7:I:169. |
Chile | |
| Maskaev et al. (2007) |
China | |
| Huiliang Xiao et al. (2002) |
Czech Republic | |
| Lapis 2000 (4) |
| Small and microscopical minerals |
Ecuador | |
| I. Vikentyev et al. (2005) |
Egypt | |
| Osman et al. (2002) |
Fiji | |
| Anthony et al. (1990) |
| Pals et al. (2003) |
Guyana | |
| Gabriel Voicu (1999) |
Indonesia | |
| Hartiningsih et al. (2022) |
Japan | |
| - (unpublished species lists maintained by local collectors) +1 other reference |
Kazakhstan | |
| Глоба В.А. Месторождение Манка - новый геолого-промышленный тип месторождений золота. // Изв. НАН РК et al. (403) |
Mexico | |
| Panczner (1987) |
| Panczner (1987) | |
Mongolia | |
| Władysław Zygo (2011) |
New Zealand | |
| Palache et al. (1944) |
Norway | |
| Hoel (1989) |
| Abildgaard (2014) | |
Peru | |
| Bendezu et al. (2009) |
| Bendezu et al. (2009) | |
Romania | |
| Wilson (1982) |
| Afifi et al. (1988) +2 other references |
| Apopei et al. (2016) |
| Palache et al. (1951) +8 other references | |
Russia | |
| Plotinskaya et al. (2009) |
| Чернявский et al. (2013) |
| Yurgenson et al. (2023) |
Sweden | |
| Scherbina (1941) |
Switzerland | |
| Stalder et al. (1998) |
Tanzania | |
| Large +2 other references |
UK | |
| R. E. Bevins (1988) +1 other reference |
USA | |
| USGS OFR 98-598 (Hawley,1998) |
| USGS OFR 98-598 (Hawley,1998) | |
| - (2008) | |
| - (2008) | |
| - (1865) +1 other reference |
| Hershey (1899) +3 other references |
| Eckel et al. (1997) |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Genth et al. (1881) | |
| Econ Geol (1994) |
| Winchell (1914) +1 other reference |
| Spry et al. (1996) |
| Osterberg (1990) |
| - (2005) |
| Castor et al. (2004) +1 other reference | |
| ora K. Foley et al. (2006) |
| Northrop et al. (1996) |
| Northrop et al. (1996) | |
| Dana 7:I:169. |
| Genth (1891) +1 other reference | |
| John E.Callahan |
| Henwood (1871) |
Uzbekistan | |
| Eleonora A. Dunin-Barkovskaya et al. (2005) |
| GEOCHMISTRY +2 other references |
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Săcărâmb, Certeju de Sus, Hunedoara County, Romania