Jalpaite
A valid IMA mineral species - grandfathered
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About Jalpaite
Formula:
Ag3CuS2
Colour:
Gray or dark gray
Lustre:
Metallic
Hardness:
2 - 2½
Specific Gravity:
6.82 - 6.85
Crystal System:
Tetragonal
Name:
Named for the type locality at Jalpa (Mexico).
Type Locality:
This page provides mineralogical data about Jalpaite.
Unique Identifiers
Mindat ID:
2069
Long-form identifier:
mindat:1:1:2069:1
IMA Classification of Jalpaite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ag1+3Cu1+S2-2
First published:
1858
Type description reference:
Classification of Jalpaite
2.BA.45
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
2.4.4.1
2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
3.2.12
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
2 : Sulphides etc. of Ag
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
2 : Sulphides etc. of Ag
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 |
|---|---|---|
| Jal | 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 Jalpaite
Metallic
Transparency:
Opaque
Colour:
Gray or dark gray
Comment:
tarnishes lustrous dark gray, locally to a chalcopyritelike iridescence
Streak:
Black
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN100=22.8 - 29.7 kg/mm2 - Vickers
Tenacity:
Sectile
Cleavage:
Distinct/Good
Prismatic
Prismatic
Fracture:
Sub-Conchoidal
Density:
6.82 - 6.85 g/cm3 (Measured) 6.827 g/cm3 (Calculated)
Optical Data of Jalpaite
Anisotropism:
Distinct, in greenish blues and pale green
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 33.5% | 34.6% |
| 420nm | 34.4% | 34.9% |
| 440nm | 35.1% | 34.8% |
| 460nm | 35.4% | 34.2% |
| 480nm | 35.2% | 33.4% |
| 500nm | 34.4% | 32.8% |
| 520nm | 33.7% | 32.4% |
| 540nm | 33.0% | 31.9% |
| 560nm | 32.4% | 31.3% |
| 580nm | 31.9% | 30.8% |
| 600nm | 31.4% | 30.5% |
| 620nm | 30.9% | 30.4% |
| 640nm | 30.4% | 30.1% |
| 660nm | 29.9% | 29.9% |
| 680nm | 29.5% | 29.5% |
| 700nm | 29.0% | 29.0% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 35.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
pale gray with bluish tint
Pleochroism:
Visible
Comments:
Distinct in oil, brownish gray to pure gray
Chemistry of Jalpaite
Mindat Formula:
Ag3CuS2
Element Weights:
Elements listed:
Common Impurities:
Fe
Crystallography of Jalpaite
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Setting:
I41/amd
Cell Parameters:
a = 8.663(1) Å, c = 11.743(1) Å
Ratio:
a:c = 1 : 1.356
Unit Cell V:
881.28 ų (Calculated from Unit Cell)
Z:
8
Morphology:
coarse, irregular and foliated masses, to 5 cm
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) |
|---|---|---|---|---|---|---|---|
| 0012059 | Jalpaite | Baker C L, Lincoln F J, Johnson W S (1992) Crystal structure determination of Ag3CuS2 from powder X-ray diffraction data Australian Journal of Chemistry 45 1441-1449 | 1992 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.345 Å | (100) |
| 2.794 Å | (90) |
| 2.740 Å | (80) |
| 2.422 Å | (80) |
| 2.114 Å | (70) |
| 4.298 Å | (60) |
| 2.006 Å | (60) |
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 Jalpaite
Place of Conservation of Type Material:
Mining Academy, Freiberg, Germany, 4705; National School of Mines, Paris, France
Other Language Names for Jalpaite
Common Associates
Associations Based on Photo Data:
| 31 photos of Jalpaite associated with Native Silver | Ag |
| 23 photos of Jalpaite associated with Quartz | SiO2 |
| 19 photos of Jalpaite associated with Stromeyerite | AgCuS |
| 19 photos of Jalpaite associated with Sphalerite | ZnS |
| 14 photos of Jalpaite associated with Chalcopyrite | CuFeS2 |
| 8 photos of Jalpaite associated with Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| 6 photos of Jalpaite associated with Iodargyrite | AgI |
| 6 photos of Jalpaite associated with Azurite | Cu3(CO3)2(OH)2 |
| 3 photos of Jalpaite associated with Malachite | Cu2(CO3)(OH)2 |
| 3 photos of Jalpaite associated with Tennantite Subgroup | Cu6(Cu4C2+2)As4S12S |
Related Minerals - Strunz-mindat Grouping
| 2.BA. | Makotoite | Ag12(Cu3Au)S8 |
| 2.BA. | Alburnite | Ag8GeTe2S4 |
| 2.BA. | Dzierżanowskite | CaCu2S2 |
| 2.BA. | Xuwenyuanite | Ag9Fe3+Te2S4 |
| 2.BA. | 'Orileyite' | (Fe,Cu)2As |
| 2.BA. | Juxingite | Bi6Cu+138Cu2+2Fe3+30S125 |
| 2.BA.05 | Djurleite | Cu31S16 |
| 2.BA.05 | Geerite | Cu8S5 |
| 2.BA.05 | Roxbyite | Cu58S32 |
| 2.BA.05 | Chalcocite | Cu2S |
| 2.BA.10 | Digenite | Cu9S5 |
| 2.BA.10 | Anilite | Cu7S4 |
| 2.BA.15 | Bornite | Cu5FeS4 |
| 2.BA.20 | Bellidoite | Cu2Se |
| 2.BA.20 | Berzelianite | Cu2-xSe (x ≈ 0.12) |
| 2.BA.25 | Athabascaite | Cu5Se4 |
| 2.BA.25 | Umangite | Cu3Se2 |
| 2.BA.30 | Rickardite | Cu7Te5 |
| 2.BA.30 | Weissite | Cu2-xTe |
| 2.BA.35 | Acanthite | Ag2S |
| 2.BA.35 | Spryite | Ag8(As3+0.5As5+0.5)S6 |
| 2.BA.40d | 'UM2003-13-S:AgAuCu' | Ag6AuCu2S5 |
| 2.BA.40 | Mckinstryite | Ag5-xCu3+xS4 |
| 2.BA.40 | Stromeyerite | AgCuS |
| 2.BA.42 | Honeaite | Au3TlTe2 |
| 2.BA.45 | Selenojalpaite | Ag3CuSe2 |
| 2.BA.45 | Kurilite | Ag8Te3Se |
| 2.BA.47 | Spiridonovite | (Cu1-xAgx)2Te |
| 2.BA.50 | Wuyanzhiite | Cu2S |
| 2.BA.50 | Eucairite | AgCuSe |
| 2.BA.52 | 'Argentite' | Ag2S |
| 2.BA.55 | Naumannite | Ag2Se |
| 2.BA.55 | Aguilarite | Ag4SeS |
| 2.BA.60 | Chenguodaite | Ag9Fe3+Te2S4 |
| 2.BA.60 | Hessite | Ag2Te |
| 2.BA.60 | Cervelleite | Ag4TeS |
| 2.BA.65 | Henryite | (Cu,Ag)3+xTe2 , with x ~ 0.40 |
| 2.BA.65 | Stützite | Ag5-xTe3, x = 0.24-0.36 |
| 2.BA.70 | Argyrodite | Ag8GeS6 |
| 2.BA.70 | Putzite | (Cu4.7Ag3.3)GeS6 |
| 2.BA.70 | Canfieldite | Ag8SnS6 |
| 2.BA.75 | Fischesserite | Ag3AuSe2 |
| 2.BA.75 | Uytenbogaardtite | Ag3AuS2 |
| 2.BA.75 | Penzhinite | (Ag,Cu)4Au(S,Se)4 |
| 2.BA.75 | Petrovskaite | AuAgS |
| 2.BA.75 | Petzite | Ag3AuTe2 |
| 2.BA.80 | Bezsmertnovite | (Au,Ag)4Cu(Te,Pb) |
| 2.BA.80 | Bilibinskite | PbCu2Au3Te2 |
| 2.BA.80 | Bogdanovite | (Au,Te,Pb)3(Cu,Fe) |
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 Jalpaite
mindat.org URL:
https://www.mindat.org/min-2069.html
Please feel free to link to this page.
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References for Jalpaite
Reference List:
Schwartz, George Melvin (1935) Relations of chalcocite-stromeyerite-argentite. Economic Geology, 30 (2) 128-146 doi:10.2113/gsecongeo.30.2.128
Suhr, Norman (1955) The Ag2S-Cu2S system. Economic Geology, 50 (3). 347-350 doi:10.2113/gsecongeo.50.3.347
Djurle, Seved, Sørensen, P., Stenhagen, Einar, Hartiala, K., Veige, S., Diczfalusy, E. (1958) An X-Ray Study on the System Ag-Cu-S. Acta Chemica Scandinavica, 12. 1427-1436 doi:10.3891/acta.chem.scand.12-1427
Skinner, Brian John (1966) The system Cu-Ag-S. Economic Geology, 61 (1) 1-26 doi:10.2113/gsecongeo.61.1.1
Grybeck, Donald, Finney, J. J. (1968) New occurrences and data for jalpaite. American Mineralogist, 53 (9-10) 1530-1542
Baker, C.L.; Lincoln, F.J.; Johnson, A.W.S. (1992) Crystal Structure Determination of Ag3CuS2 From Powder X-Ray Diffraction Data. Australian Journal of Chemistry, 45 (9). 1441-1449 doi:10.1071/ch9921441
Hu, J.Q, Deng, B, Zhang, W.X, Tang, K.B, Qian, Y.T (2001) A convenient hydrothermal route to mineral Ag3CuS2 nanorods. International Journal of Inorganic Materials, 3 (7) 639-642 doi:10.1016/s1466-6049(01)00163-5
Asadov, Yu. G., Alyev, Yu. I., Jafarov, K. M. (2008) X-ray diffraction study of compounds in the Ag2S-Cu2S system. Inorganic Materials, 44 (5) 460-466 doi:10.1134/s0020168508050051
Localities for Jalpaite
Showing 179 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.
Argentina | |
| Márquez-Zavalía et al. (2016) |
| Mugas Lobos et al. (2020) |
| Smith (2009) |
Australia | |
| Quan et al. (2025) |
| Quan et al. (2025) | |
| Quan et al. (2025) | |
| Henley et al. (2001) |
| Ramdohr (1950) |
| Paul +1 other reference |
| Ralph Bottrill et al in prep. +1 other reference |
| Bottrill et al. (2008) | |
| Bottrill et al. (2008) | |
| Mössinger et al. (2026) |
| MacLeod (1991) |
| I. R. Mulholland et al. (1998) +1 other reference |
Austria | |
| |
Bolivia | |
| Torres et al. (2019) |
| Dr. Werner Paar analyses |
| USGS Bulletin # 1975 |
| Torró et al. (2019) |
Canada | |
| Blackadar (1981) |
| Lang (1952) +1 other reference |
| Lang (1952) | |
| Lang (1952) |
| Economic Geology (1996) |
Chile | |
| Lortie et al. (1987) |
China | |
| Cai et al. (2009) |
| Jiarong Pan and Yangzhong Yu (2013) |
| Zuwei Wang and Yongzhang Zhou (2002) |
| Enguang Zang et al. (2009) |
| Tian et al. (2023) +1 other reference |
| Tian et al. (2026) | |
| Zhanke Li et al. (2010) | |
| Diankai Chen and Danshen Zhou (1984) +1 other reference |
| Diankai Chen and Danshen Zhou (1984) +1 other reference | |
| Shuchu Ji and Yafu Wang (1991) |
| Dongbo Wang et al. (1991) |
| Shihe Lei et al. (1998) |
| Tian et al. (2026) |
| Song et al. (2025) |
| Dequan Zhang (1993) |
| Zengyao Lü et al. (2004) |
| Weining Zhou (1994) |
| Zengyao Lü et al. (2004) |
| Libo Hao et al. (1994) +1 other reference |
| Wang Chen et al. (2006) |
| Wang et al. (2024) |
| Liyan Zhang and Jigang Tang (1996) |
| Dianyu Zhou et al. (2007) |
| Kai Zhang and Yongdong Shi (2000) |
| Jianjun Hao et al. (2001) |
| Gu et al. (2003) |
| Shaozhi Zhou (1999) |
| Xiumei Xiao (1992) +2 other references | |
| Jiaxin Teng and Qingming Wang (2006) |
| Yunman Zhou (1999) |
| Zhenkuan Luo et al. (1985) +1 other reference |
Czech Republic | |
| Pauliš et al. (2022) |
| Pažout et al. (2026) |
| Anthony et al. (1990) |
| Dolníček et al. (2024) |
| Sejkora et al. (2024) |
| Kohout et al. (1995) |
| Šulcová et al. (1986) | |
| Sejkora (1994) |
El Salvador | |
| Müller-Kahle (1962) |
Europe | |
| tin.er.usgs.gov (n.d.) +3 other references | |
France | |
| Pélisson (1989) |
| Pélisson (1989) |
| Pélisson (1989) | |
| Pélisson (1989) |
| Briggs (1975) |
| Anthony et al. (1990) |
Germany | |
| Blaß et al. (1996) +2 other references |
| Nickel et al. (1985) |
| Wittern (2001) |
Hungary | |
| Szakáll & Weiszburg: Topographia ... |
Indonesia | |
| Nur et al. (2012) |
Iran | |
| Barati et al. (2024) |
| Altenberger et al. (2022) |
Ireland | |
| John R. Sullivan et al (2005) |
| Patterson (1970) +4 other references |
Italy | |
| Gentile et al. (2023) |
| Orlandi P. & Silvani A (1994) |
| Stara et al. (1999) |
| - (n.d.) | |
| Fiori (1998) +1 other reference |
Japan | |
| Shimizu et al. (1998) |
| Imai et al. (1972) +2 other references |
| FURUNO et al. (1992) |
| Taguchi et al. (1974) |
| Akasaka (2007) |
| Akasaka et al. (2007, August) +1 other reference | |
Kazakhstan | |
| Baibatsha et al. (2015) +1 other reference |
| - (2005) |
Malaysia | |
| Wolfram Dieter Schuh (1993) |
Mexico | |
| Sotelo (2016) |
| Sotelo (2016) | |
| Rick Turner. |
| Conrad et al. (1992) |
| Miguel Romero Collection |
| Panczner (1987) |
| Grybeck et al. (1968) |
| Hoffay +2 other references |
Morocco | |
| Moussaid et al. (2023) |
Norway | |
| Lietz (1939) +1 other reference |
| Lietz (1939) +1 other reference | |
| Kotková et al. (2018) | |
| Cook et al. (1998) |
Peru | |
| Hyrsl et al. (2003) |
| www.sec.gov (n.d.) |
| Gamarra-Urrunaga et al. (2013) |
Poland | |
| Piestrzyński et al. (2012) |
| Kucha H. 2007: Mineralogia kruszcowa i ... |
| Chmielewski et al. (2022) |
Portugal | |
| Alves (2017) |
Russia | |
| Eremin +3 other references |
| Frank Keutsch collection analyzed ... +1 other reference |
| Maslennikov et al. (2013) |
| Maslennikov et al. (2013) |
| Bortnikov et al. (2023) |
| [Der Aufschluss 1995:4 p163-180] +2 other references |
| Savva et al. (2019) |
| Volkov et al. (2018) | |
| Volkov et al. (2023) |
| Savva et al. (2011) +1 other reference |
| Kazachenko et al. (2008, August) |
| Иващенко et al. (2015) |
| Ivashchenko et al. (2011, September) | |
| Kondratieva et al. (2021) +5 other references |
| Kondratieva et al. (2021) | |
| Kasatkin et al. (2021) |
| Sejkora et al. (2021) |
| Kuzhuget et al. (2015) |
| Shavekina et al. (2026) |
Slovakia | |
| Chovan et al. (2016) +2 other references |
| Koděra |
| Mikuš et al. (2026) |
| Duda et. all. |
| Ďuďa R. (2001) | |
South Africa | |
| Nikolay Rudashevsky et al (2001) |
South Korea | |
| Choi et al. (2005) |
Sweden | |
| Nysten |
Turkey | |
| Blanks et al. (2014) |
| Çiçek et al. (2017) |
USA | |
| Taylor |
| Graeme (1993) |
| Graeme (1993) +1 other reference | |
| Seitter et al. (2026) |
| Wilson (1984) +1 other reference |
| Foord et al. (1989) +1 other reference |
| Eckel et al. (1997) | |
| Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Grybeck et al. (1968) +1 other reference |
| Grybeck et al. (1968) +1 other reference |
| Eckel et al. (1997) |
| Foley +4 other references | |
| Raabe et al. (1984) +1 other reference |
| Grybeck et al. (1968) +1 other reference |
| Eckel et al. (1997) | |
| Gearity (2013) |
| Gammons et al. (2016) +1 other reference |
| Cain et al. (2007) |
| Castor et al. (2004) |
| Vikre (1989) +1 other reference |
| Vikre (1989) +1 other reference | |
| Haas (n.d.) |
| [Rocks & Minerals Vol 68 March/April ... |
| Northrop et al. (1996) |
| Northrop et al. (1996) |
| Roberts et al. (1997) |
| USGS Professional Paper 614-A +1 other reference |
| Favreau (n.d.) | |
| Cannon (1991) |
Uzbekistan | |
| Kozlov et al. (1996) |
| Kovalenker et al. (2003) |
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The
Jalpa, Jalpa Municipality, Zacatecas, Mexico