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About MckinstryiteHide

x ≈ 0-0.28
Steel gray
1½ - 2½
Specific Gravity:
Crystal System:
For Hugh Exton McKinstry (1896-1961), Professor of Geology, Harvard University.
Low-temperature sulphide, often associated with the chemically related stromeyerite and jalpaite.
Formula previously given in a simplified way as (Ag,Cu)2S, now revised to ~Ag5Cu3S4 on the basis of a crystal structure solution (Kolitsch, 2010).

Classification of MckinstryiteHide


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

4 : AmBnXp, with (m+n):p = 2:1

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

Physical Properties of MckinstryiteHide

Steel gray
Tarnishes to dark gray to black
Dark steel-gray
1½ - 2½ on Mohs scale
VHN25=43 - 45 kg/mm2 - Vickers
One poor direction.
6.61 g/cm3 (Measured)    6.57 g/cm3 (Calculated)

Optical Data of MckinstryiteHide

Strong in gray, pale grayish blue and light tan.
Colour in reflected light:
Light grayish white

Chemical Properties of MckinstryiteHide


x ≈ 0-0.28
IMA Formula:

Crystallography of MckinstryiteHide

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cell Parameters:
a = 14.043 Å, b = 7.803 Å, c = 15.677 Å
a:b:c = 1.8 : 1 : 2.009
Unit Cell V:
1,717.85 ų (Calculated from Unit Cell)
Granular aggregates.
Cell data for type material.

Type Occurrence of MckinstryiteHide

Synonyms of MckinstryiteHide

Other Language Names for MckinstryiteHide

Simplified Chinese:马硫铜银矿
Traditional Chinese:馬硫銅銀礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
Vaterite1 photo of Mckinstryite associated with Vaterite on mindat.org.
Jalpaite1 photo of Mckinstryite associated with Jalpaite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.BA.DzierżanowskiteCaCu2S2Trig. 3m (3 2/m) : P3m1
2.BA.05ChalcociteCu2SMon. 2/m : P21/b
2.BA.05DjurleiteCu31S16Mon. 2/m
2.BA.05GeeriteCu8S5Trig. 3
2.BA.05RoxbyiteCu9S5Tric. 1 : P1
2.BA.10AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.10DigeniteCu9S5Trig. 3m (3 2/m) : R3m
2.BA.15BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
2.BA.20BellidoiteCu2SeTet. 4/m : P42/n
2.BA.20BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
2.BA.35AcanthiteAg2SMon. 2/m : P21/m
2.BA.40StromeyeriteAgCuSOrth. mmm (2/m 2/m 2/m)
2.BA.45SelenojalpaiteAg3CuSe2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
2.BA.55AguilariteAg4SeSMon. 2/m
2.BA.55NaumanniteAg2SeOrth. 2 2 2 : P21 21 21
2.BA.60CervelleiteAg4TeSMon. 2/m
2.BA.60HessiteAg2TeMon. 2/m : P21/b
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40 Iso. m3m (4/m 3 2/m) : Fd3c
2.BA.65StütziteAg5-xTe3, x = 0.24-0.36Hex. 6 : P6
2.BA.70ArgyroditeAg8GeS6Orth. mm2 : Pna21
2.BA.70CanfielditeAg8SnS6Orth. mm2
2.BA.70Putzite(Cu4.7Ag3.3)GeS6Iso. 4 3m : F4 3m
2.BA.75FischesseriteAg3AuSe2Iso. 4 3 2 : I41 3 2
2.BA.75PetziteAg3AuTe2Iso. 4 3 2 : I41 3 2
2.BA.75UytenbogaardtiteAg3AuS2Trig. 3m (3 2/m) : R3c

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.2.1AcanthiteAg2SMon. 2/m : P21/m
3.2.3NaumanniteAg2SeOrth. 2 2 2 : P21 21 21
3.2.4AguilariteAg4SeSMon. 2/m
3.2.5HessiteAg2TeMon. 2/m : P21/b
3.2.6EmpressiteAgTeOrth. mmm (2/m 2/m 2/m)
3.2.7StütziteAg5-xTe3, x = 0.24-0.36Hex. 6 : P6
3.2.8CervelleiteAg4TeSMon. 2/m
3.2.9DervilliteAg2AsS2Mon. 2/m : P2/b
3.2.10StromeyeriteAgCuSOrth. mmm (2/m 2/m 2/m)
3.2.14CameroniteCu5-x(Cu,Ag)3+xTe10 (x = 0.43)Mon. 2/m : B2/b
3.2.15Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40 Iso. m3m (4/m 3 2/m) : Fd3c
3.2.16SternbergiteAgFe2S3Orth. mmm (2/m 2/m 2/m)
3.2.17ArgentopyriteAgFe2S3Mon. 2/m
3.2.18Geffroyite(Cu,Fe,Ag)9(Se,S)8Iso. m3m (4/m 3 2/m) : Fm3m
3.2.19ArgentopentlanditeAg(Fe,Ni)8S8Iso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

Thermal Behaviour:
Stable below 94.4 degrees C.
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 MckinstryiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Djurle, S. (1958): X-ray study of the Ag-Cu-S system. Acta Chemica Scandinavica, 12, 1427-1436.
Skinner, B.J. (1966): The system Cu-Ag-S. Economic Geology, 61, 1-26.
Skinner, B.J., Jambor, J.L. and Ross, M. (1966) Mckinstryite, a new copper-silver sulfide. Economic Geology, 61, 1383-1389.
American Mineralogist (1967): 52: 1253.
Robinson, B.W. and Morton, R.D. (1971): Mckinstryite from the Echo Bay Mine, N.W.T., Canada. Economic Geology, 66, 342-347.
Yarenskaya, M. A.; Kostogonov, V. G.; Muratov, E. M.; Slyusarev, A. P. (1975): First find of mackinstryite in the USSR. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 104, 62-65 (in Russian).
Pekov, I.V. and Karpenko, V.Yu. (1996) Unusual stromeyerite-mckinstryite pseudomorphs after dyscrasite in the Sarbai deposit of northern Kazakhstan. Vestnik Moskovskogo Universiteta, Seriya 4: Geologiya, (6), 45-50 (in Russian).
Schmidt, J.A. and Sagua, A.E. (1999) The chemical diffusion coefficient of silver in Ag1.2Cu0.8S (-phase) determined by the potentiometric method. Anales de la Asociacion Quimica Argentina, 87, 111-120.
Kolitsch, U. (2010): The crystal structure and compositional range of mckinstryite. Mineral. Mag. 74, 73-84.

Internet Links for MckinstryiteHide

Localities for MckinstryiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
Birch BH Book
  • Western Australia
    • Roebourne Shire
      • Karratha
Marshall, A.E. (2001) Low temperature-low pressure ('epithermal') vein deposits of the North Pilbara granite-greenstone terrane, Western Australia. Australian Geological Survey Organisation, Department of Industry, Science & Resources, AGSO Record 2000/1.
  • Salzburg
    • Saalfelden
      • Leogang
        • Hütten
          • Schwarzleograben
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
R.Poeverlein (2016)
  • Potosí
    • Chayanta Province
Dr. Werner Paar analyses
  • Vratsa Province
    • Balkan Mts (Stara Planina)
Atanasov, V. and Lavrentiev, Yu. (1973) New occurrence of mackinstryite. Spisanie na Bulgarskoto Geologichesko Druzhestvo, 34, 309-320 (in Bulgarian).; Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Atanassov, V.A. and Kirov, G.N. (1973): Balkanite, Cu9Ag5HgS8, a new mineral from the Sedmochislenitsi mine, Bulgaria. American Mineralogist, 58, 11-15.; ATANASSOVA, S. THE PRESERVED MINERAL DIVERSITY OF SEDMOCHISLENITSI DEPOSIT, VRATSA ORE REGION.
  • Northwest Territories
    • Mackenzie District
      • Great Bear Lake
Rod Tyson, The Port Radium District, Northwest Territories, Canada Mineralogical Record (1989) vol.20. #3, pp 201-208 .
Robinson, B. W. and Morton, R. D. (1971): Mckinstryite from the Echo Bay Mine, N.W.T., Canada. Economic Geology 66, 342-347.
  • Ontario
    • Timiskaming District
      • Cobalt-Gowganda region
        • Cobalt area
          • Coleman Township
SKINNER, B.J., JAMBOR, J.L. & ROSS, M. (1966): Mckinstryite, a new copper-silver sulfide. Economic Geology 61, 1383-1389. Dana 7:I:343.
Richard Gunter
  • Québec
    • Abitibi-Témiscamingue
      • Abitibi RCM
SABINA, A.P. (2003): Rocks & Minerals for the collector; Kirkland Lake - Rouyn-Noranda - Val d'Or, Ontario & Quebec. GSC Misc. Report 77, 111.
  • Atacama
    • Copiapó Province
      • Pabellón
        • Sierra Jardín
Econ Geol (1987) 82:546-570
  • Jilin
    • Siping
      • Lishu Co.
Dong Zhensheng et al. (1996). In: Tu Guangzhi, Ed.: Low Temperature Geochemistry, Science Press (Beijing), 32-42; Shouzhong Feng and Miao Feng (2000): Journal of Precious Metallic Geology 9(1)
  • Shandong
    • Jiaodong Peninsula (Jiaodong Gold Province)
      • Yantai
        • Zhaoyuan Co.
Xiang-Ping Gu, Makoto Watanabe, Kenichi Hoshino, and Yasuhiro Shibata (2003): European Journal of Mineralogy 15(1), 147-155.
  • Shanxi
    • Datong
      • Lingqiu Co.
Xiumei Xiao (1992): Geology and Prospecting 28(10), 13-17; Jin Chen and Yuelin Tang (1993): Geology and Prospecting 29(11), 16-22, 28; Shaozhi Zhou (1999): Geology and Prospecting 35(3), 6-8, 23; Shuchen Li and Lixia Zhou (2008): Geology and Prospecting 44(3), 18-21
Czech Republic
  • Central Bohemian Region
    • Příbram District
      • Vrančice
[Lapis 1995, 12, p.13-24]
Šulcová, V. and Kašpar, P. (1986) Mckinstryite and jalpaite from the Pošepny vein at Vrančice near Přibram, Czechoslovakia. Časopis pro Mineralogii a Geologii, 31, 183-184 (in Czech).
  • Red Sea
    • Eastern Desert
      • Um Samiuki
Canadian Mineralogist Feb. 1999; Ibrahim M. Shalaby, Eugen Stumpfl, Hassan M. Helmy, Mahmoud M. El Mahallawi and Omar A. Kamel (2004) Silver and silver-bearing minerals at the Um Samiuki volcanogenic massive sulphide deposit, Eastern Desert, Egypt. Mineralium Deposita Volume 39, Numbers 5-6, 608-621
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Wolfach
          • Oberwolfach
            • Rankach valley
U. Kolitsch, J. Gröbner, F. Brandstätter and R. Bayerl (2010): Neufunde aus der Grube Clara im mittleren Schwarzwald (IV): Calcioandyrobertsit, Cotunnit, Gerhardtit, Khaidarkanit, Lukrahnit, Mckinstryit, Moolooit, Rhabdophan-(La), Rouait und Uricit. Lapis 35 (9), 22-27; 62 (in German).
  • Java
    • West Java Province
      • Bogor District
The Canadian Mineralogist Vol. 41, pp. 185-200 (2003); Syafrizal; Imai, A.; Motomura, Y.; Watanabe, K. (2005): Characteristics of gold mineralization at the Ciurug vein, Pongkor gold-silver deposit, West Java, Indonesia. Resource Geology 55, 225-238.; Yuningsih, E. T., Matsueda, H., & Rosana, M. F. (2014). Epithermal Gold-Silver Deposits in Western Java, Indonesia: Gold-Silver Selenide-Telluride Mineralization. Indonesian Journal on Geoscience, 1(2), 71-81.
  • Akita
    • Odate
Suji Ohno & Juichi Sato Ganko Vol. 90, 268-279 (1995) .
  • Hokkaidō
    • Ishikari Province
Economic Geology 93 (1998) 303-325.
  • Hyogo
    • Kawabe-gun
      • Inagawa-cho
Imai, H. & Lee, M. S. (1972): Silver minerals from the xenothermal deposits in the western Kinki Metallogenetic Province, with special reference to silver minerals from the Tada Mine. Journal of the Faculty of Engineering, University of Tokyo, Series A: Annual Report, No. 10, 54-55 (in Japanese).; Imai, H. (1978) Geological studies of the mineral deposits in Japan and East Asia. pp 87-105 (University of Tokyo Press)
  • Niigata
    • Sado Island
Taguchi et al (1974) Koubutsugaku Zasshi, 11, 345-358.
  • Kostanay Region
    • Rudny
Pekov, I.V. and Karpenko, V.Yu. (1996) Unusual stromeyerite-mckinstryite pseudomorphs after dyscrasite in the Sarbai deposit of northern Kazakhstan. Vestnik Moskovskogo Universiteta, Seriya 4: Geologiya, (6), 45-50 (in Russian).; [World of Stones 12:13]
Pavel M. Kartashov data
  • Pavlodar Region
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
  • Sarawak
    • Kuching
      • Bau
Wolfram Dieter Schuh (1993) Geology, Geochemistry, And Ore Deposits Of The Bau Gold Mining District, Sarawak, Malaysia. PhD Thesis University of Arizona.
  • Chihuahua
    • Mun. de Chínipas
      • Palmarejo
Sotelo, C. M. (2016). Geology and mineralization controls surrounding the Palmarejo mining district-A compilation of remote and hands on exploration techniques. The University of Texas at El Paso.
New Zealand
  • North Island
    • Waikato Region
      • Hauraki District
        • Waihi
Simpson, M. P., & Mauk, J. L. (2011). Hydrothermal alteration and veins at the epithermal Au-Ag deposits and prospects of the Waitekauri area, Hauraki goldfield, New Zealand. Economic Geology, 106(6), 945-973.
  • Nordland
    • Hemnes
      • Bleikvassli
Cook, N.J., Spry, P.G., and Vokes, F.M. (1998): Mineralogy and textural relationships among sulphosalts and related minerals in the Bleikvassli Zn-Pb-(Cu) deposit, Nordland, Norway. Mineralium Deposita 34, 35-56.
  • Trøndelag
    • Grong
      • Godejorda
Bergstöl, S. & Vokes, F.M. (1974) Stromeyerite and mckinstryite from the Godejord polymetallic sulfide deposit, central Norwegian Caledonides. Mineralium Deposita 9, 325-337.
    • Trondheim
      • Bymarka
Størseth, L. R. (2016): Kompleks sulfidmineralisering i kaledonske kvartsganger ved Trondheim. Norsk mineralsymposium 2016: 61-76
  • Lower Silesian Voivodeship
    • Lubin Co.
      • Gmina Lubin
Kozub-Budzyń, G., Piestrzyński, A. (2018): The first occurrence of cupropearceite in the Kupferschiefer deposit, Lubin mine, SW Poland. Geological Quarterly: 62(2): 319-326
Kucha H. 2007: Mineralogia kruszcowa i geochemia ciała rudnego złoża Lubin-Sieroszowice. Biuletyn PIG, vol. 423, pp. 77-94
  • Chelyabinsk Oblast
    • Verkhneural'sk District
Maslennikov, V. V., Maslennikova, S. P., Large, R. R., Danyushevsky, L. V., Herrington, R. J., & Stanley, C. J. (2013). Tellurium-bearing minerals in zoned sulfide chimneys from Cu-Zn massive sulfide deposits of the Urals, Russia. Mineralogy and Petrology, 107(1), 67-99.
  • Magadan Oblast
    • Kolyma River Basin
      • Ducat District
        • Omsukchan
Volkov, A. V., Savva, N. E., Kolova, E. E., Sidorov, A. A. (2018): Peculiarities of ore formation at the Teploe Ag–Au deposit, Northeast Russia. Doklady Earth Sciences 481, 869-872.
  • Murmansk Oblast
    • Voron'i Tundry
A. A. Kalinin, Ye. E. Savchenko, E. A. Selivanova. (2016) Precious Metal Minerals in the Oleninskoe Gold Occurence, the Kolmozero-voronya Belt (Kola Peninsula). Zapiski RMO, N 6, 2:102
  • Zabaykalsky Krai
    • Buriatia Republic (Buryatia)
      • Okinsky District
Damdinov, B. B., & Damdinova, L. B. (2018). Zun-Ospa Gold Deposit, Eastern Sayan: Geology, Ore Composition, and Genesis. Geology of Ore Deposits, 60(3), 241-264.
Saudi Arabia
  • Mintaqah Al Qasim
Bakhsh, R. A. (2018). Microanalysis and genesis of Cu-Ag minerals in metadiabase dykes at the Jabal Zalm area, Saudi Arabia. Ore Geology Reviews, 95, 713-724.
Bakhsh, R.A. (2018): Microanalysis and genesis of Cu-Ag minerals in metadiabase dykes at the Jabal Zalm area, Saudi Arabia. Ore Geology Reviews 95, 713-724.
  • Banská Bystrica Region
    • Banská Štiavnica Co.
  • Gävleborg County
    • Sandviken
GFF (1984) 106:4, 305-317
  • Örebro County
    • Hällefors
      • Grythyttan
  • Värmland County
    • Arvika
      • Glava
Bonev, I. K., Petrunov, R., Cook, N. J., & Ciobanu, C. L. (2005). Kostovite and its argentian varieties: Deposits and mineral associations. Geochem. Mineral. Petrol.(Bulg. Acad. Sci.), 42, 1-22.
  • Black Sea Region
    • Gümüşhane Province
Beih. z. Eur. J. Mineral 18 (2006) 28
  • Marmara Region
    • Balikesir Province
      • Sindirgi
Blanks, D. E., Holwell, D. A. and Coller, I. V. (2014), Multi Stage Epithermal Au-Ag Mineralisation in the Kiziltepe Deposit, Western Turkey: Evidence From 3D High Resolution CT Scanning. Acta Geologica Sinica, 88: 706–707.
  • Alaska
    • Juneau
      • Admiralty District
Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska: U.S. Geological Survey Professional Paper 1763, 429 p., 7 plates on CD.
  • Arizona
    • Cochise Co.
      • Tombstone Hills
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 291.
  • Colorado
    • Clear Creek Co.
      • Georgetown District
Minerals of Colorado (1997) Eckel, E. B.
        • Illinois Mine
Minerals of Colorado (1997) Eckel, E. B.; American Mineralogist: 53: 1530-1542
    • Mineral Co.
      • Creede District
Minerals of Colorado (1997) E.B. Eckel
Minerals of Colorado (1997) E.B. Eckel; Foley, N. K.; Caddey, S. W.; Byington, C. B.; Vardiman, D. M. (1993) Mineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado. USGS Professional Paper: 1537
  • Nevada
    • Nye Co.
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Catron Co.
      • Mogollon Mts
Northrop, 3rd rev. ed. (1996) Minerals of New Mexico
    • Grant Co.
      • Big Burro Mts
[Rocks & Minerals Vol 68 March/April 1993 p96]
[Rocks & Minerals Vol 68 March/April 1993 p96]
Mineral and/or Locality  
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