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Gratonite

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Louis C. Graton
Formula:
Pb9As4S15
System:
Trigonal
Colour:
Dark lead-gray
Hardness:
Name:
Named in 1939 by Charles Palache and D. Jerome Fisher in honor of Louis Caryl Graton (June 10, 1880, Parma, New York - July 22, 1970, New Haven Connecticut), Professor of Mining Geology, Harvard University, president of the Society of Economic Geologists (1931) and Penrose Medal recipient (1950).
Compare baumhauerite, liveingite, sartorite, 'UM1966-04-S:AsPb'.

The structure contains isolated and interconnected AsS3 pyramids, as, e.g., in case of baumhauerite, dufrénoysite, sartorite, and seligmannite.

Chemically related to, and sometimes associated with, jordanite.
Gratonite is considered a low-temperature dimorph of jordanite, the inversion occurring on heating below 250°C (Roland, 1968).


Classification of Gratonite

Approved, 'Grandfathered' (first described prior to 1959)
2.JB.55

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb
3.3.2.1

3 : SULFOSALTS
3 : 3 <ø < 4
5.6.5

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
6 : Sulpharsenites etc. of Pb alone

Occurrences of Gratonite

Type Occurrence of Gratonite

Physical Properties of Gratonite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Dark lead-gray
Streak:
Black
Hardness (Mohs):
Hardness (Vickers):
VHN100=130 - 146 kg/mm2
Hardness Data:
Measured
Tenacity:
Brittle
Density:
6.22(2) g/cm3 (Measured)    6.17 g/cm3 (Calculated)

Crystallography of Gratonite

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 17.758(14) Å, c = 7.807(6) Å
Ratio:
a:c = 1 : 0.44
Unit Cell Volume:
V 2,132.08 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Prismatic crystals, massive.

Crystallographic forms of Gratonite

Crystal Atlas:
Image Loading
Click on an icon to view
Gratonite - {110}, {021}
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Gratonite

Type:
Anisotropic
Anisotropism:
Weak
Colour in reflected light:
White - slightly yellow as compared to galena
Pleochroism:
Weak

Chemical Properties of Gratonite

Formula:
Pb9As4S15
All elements listed in formula:
Common Impurities:
Fe,Sb

Relationship of Gratonite to other Species

Other Members of Group:
ArsenmarcobaldiitePb12(As3.2Sb2.8)Σ6S21
JordanitePb14(As,Sb)6S23
KirkiitePb10Bi3As3S19
MarcobaldiitePb12(Sb3As2Bi)Σ6S21
2.JB.05DiaphoriteAg3Pb2Sb3S8
2.JB.10CosalitePb2Bi2S5
2.JB.15FreieslebeniteAgPbSbS3
2.JB.15MarriteAgPbAsS3
2.JB.20CannizzaritePb4Bi6S13
2.JB.20WittitePb9Bi12(S,Se)27
2.JB.25aJunoiteCu2Pb3Bi8(S,Se)16
2.JB.25iNeyiteAg2Cu6Pb25Bi26S68
2.JB.25cNordströmiteCuPb3Bi7(Se4S10)
2.JB.25gNuffielditeCu1.4Pb2.4Bi2.4Sb0.2S7
2.JB.25dProuditeCuPb7.5Bi9.33(S,Se)22
2.JB.25hWeibullitePb5Bi8Se7S11
2.JB.25bFelbertaliteCu2Pb6Bi8S19
2.JB.25jRouxeliteCu2HgPb23Sb27S65.5
2.JB.25fÁngelaiteCu2AgPbBiS4
2.JB.25iCuproneyiteCu7Pb27Bi25S68
2.JB.30aGeocronitePb14(Sb,As)6S23
2.JB.30aJordanitePb14(As,Sb)6S23
2.JB.30bKirkiitePb10Bi3As3S19
2.JB.30cTsugaruitePb4As2S7
2.JB.35cPillaitePb9Sb10S23ClO0.5
2.JB.35aZinkenitePb9Sb22S42
2.JB.35bScainiitePb14Sb30S54O5
2.JB.35dPellouxite(Cu,Ag)Pb10Sb12S27O(Cl,S)0.6
2.JB.35fTubuliteAg2Pb22Sb20S53
2.JB.35eChovanitePb15-2xSb14+2xS36Ox (x ~ 0.2)
2.JB.40bAschamalmitePb6Bi2S9
2.JB.40aBursaitePb5Bi4S11 (?)
2.JB.40bEskimoiteAg7Pb10Bi15S36
2.JB.40aFizélyiteAg5Pb14Sb21S48
2.JB.40aGustaviteAgPbBi3S6
2.JB.40aLillianitePb3-2xAgxBi2+xS6
2.JB.40cOurayiteAg3Pb4Bi5S13
2.JB.40aRamdohritePb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24
2.JB.40aRoshchiniteAg19Pb10Sb51S96
2.JB.40dSchirmeritePbAgBi3S6 - Pb3Ag1.5Bi3.5S9
2.JB.40aTreasuriteAg7Pb6Bi15S32
2.JB.40aUchucchacuaiteAgMnPb3Sb5S12
2.JB.40eUstarasitePb(Bi,Sb)6S10 (?)
2.JB.40aVikingiteAg5Pb8Bi13S30
2.JB.40aXilingolitePb3Bi2S6
2.JB.40bHeyrovskýitePb6Bi2S9
2.JB.40UM1988-05-S:AgBiCuHgPb(Hg,Ag,Cu,Pb)5Pb5Bi11S27
2.JB.40UM1988-06-S:AgBiCuHgPb(Pb,Hg)12(Cu,Ag)3(Bi,Sb)10(S,Te)27
2.JB.40aAndorite IVPb18Ag15Sb47S96
2.JB.60MarrucciiteHg3Pb16Sb18S46
2.JB.65VurroitePb20Sn2(Bi,As)22S54Cl6
5.6.1SartoritePbAs2S4
5.6.2DufrénoysitePb2As2S5
5.6.3LiveingitePb9As13S28
5.6.4BaumhaueritePb12As16S36
5.6.6JordanitePb14(As,Sb)6S23
5.6.7FülöppitePb3Sb8S15
5.6.8ZinkenitePb9Sb22S42
5.6.9PlagionitePb5Sb8S17
5.6.10HeteromorphitePb7Sb8S19
5.6.11LaunayiteCuPb10(Sb,As)12S20
5.6.12PlayfairitePb16(Sb,As)19S44Cl
5.6.13SemseyitePb9Sb8S21
5.6.14MadocitePb19(Sb,As)16S43
5.6.15BoulangeritePb5Sb4S11
5.6.17RobinsonitePb4Sb6S13
5.6.18GuettarditePbAsSbS4
5.6.19Twinnite Pb0.8Tl0.1Sb1.3As0.8S4
5.6.20VeenitePb2(Sb,As)2S5
5.6.21SorbyiteCuPb9(Sb,As)11S26
5.6.22GeocronitePb14(Sb,As)6S23
5.6.23GalenobismutitePbBi2S4
5.6.24CosalitePb2Bi2S5
5.6.25CannizzaritePb4Bi6S13
5.6.26LillianitePb3-2xAgxBi2+xS6
5.6.27GiessenitePb27Cu2(Bi,Sb)19S57
5.6.28Platynite
5.6.29XilingolitePb3Bi2S6
5.6.30WeibullitePb5Bi8Se7S11
5.6.31WittitePb9Bi12(S,Se)27
5.6.32KirkiitePb10Bi3As3S19
5.6.33UstarasitePb(Bi,Sb)6S10 (?)

Other Names for Gratonite

Name in Other Languages:
German:Gratonit
Simplified Chinese:细硫砷铅矿
Spanish:Gratonita

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 Gratonite

Reference List:
Palache, C., Fisher, D.J. (1939) Gratonite - preliminary description of a new mineral from Cerro de Pasco, Peru. American Mineralogist: 24: 136-136.

Palache, C., Fisher, D.J. (1940) Gratonite - A new mineral from Cerro de Pasco, Peru. American Mineralogist: 25: 255-265.

Rust, G.W. (1940) Geologic occurrence of gratonite at Cerro de Pasco, Peru. American Mineralogist: 25: 266-270.

Palache, C., Berman, H., Frondel, C. (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 397-398.

Roland, G.W. (1968) The system Pb-As-S. Composition and stability of jordanite. Mineralium Deposita 3, 249-260.

Ribár, B., Nowacki, W. (1969) Neubestimmung der Kristallstruktur von Gratonit, Pb9As4S15. Zeitschrift für Kristallographie: 128: 321-338.

Kharbish, S. (2016) Micro‐Raman spectroscopic investigations of extremely scarce Pb–As sulfosalt minerals: baumhauerite, dufrénoysite, gratonite, sartorite, and seligmannite. Journal of Raman Spectroscopy: 47: [in press]; http://forum.amiminerals.it/viewtopic.php?f=5&t=12869 (2016)

Internet Links for Gratonite

mindat.org URL:
http://www.mindat.org/min-1741.html
Please feel free to link to this page.
Specimens:
The following Gratonite specimens are currently listed for sale on minfind.com.

Localities for Gratonite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Argentina
 
  • Mendoza
    • Las Heras Department
      • Uspallata
Schalamuk, I.B. et al (1994) Revista del Museo de La Plata
Brodtkorb, Milka K. de (2002) Las Especies Minerales de la República Argentina. Tomo I. (Asociación Mineralógica Argentina)
Canada
 
  • Ontario
    • Hastings Co.
      • Madoc area
        • Huntingdon Township
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
China
 
  • Yunnan Province
    • Nujiang Autonomous Prefecture
      • Lanping Co.
        • Baiyangping ore field
          • Western ore zone
Xiaohu Wang, Yucai Song, Zengqian Hou, Hongrui Zhang, Zhe Wang, Tianming Zhuang, Chong Zhang, and Tianfu Zhang (2011): Acta Petrologica et Mineralogica 30(3), 507-518
Xiaohu Wang, Yucai Song, Zengqian Hou, Hongrui Zhang, Zhe Wang, Tianming Zhuang, Chong Zhang, and Tianfu Zhang (2011): Acta Petrologica et Mineralogica 30(3), 507-518
Dominican Republic
 
  • Sánchez Ramírez Province
    • Cotuí
Kettler, R. M., Rye, R. O., Kesler, S. E., Meyers, P. A., Polanco, J., & Russell, N. (1992). Gold deposition by sulfidation of ferrous Fe in the lacustrine sediments of the Pueblo Viejo district (Dominican Republic): The effect of Fe–C–S diagenesis on later hydrothermal mineralization in a Maar-Diatreme complex. Chemical geology, 99(1), 29-50.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Lahr
        • Reichenbach
Lapis 21(12), 42 (1996)
    • Wiesloch
P. Ramdohr, (1980) The Ore Minerals and Their Intergrowths,2nd ed., Pergammon Press, pg 757. P. Ramdohr, Ore Mineralogy, 3rd ed., pg 1159
  • Saxony
    • Vogtland
      • Reichenbach
        • Limbach
Tröger, S. (2012): Der Steinbruch Reimersgrün im Sächsischen Vogtland. Lapis 37 (10), 32-39.
Ireland
 
  • Co. Tipperary
    • Moyne
Econ Geol (2005) 100:63-86
Isle of Man
 
  • Laxey
MINERALOGICAL MAGAZINE, SEPTEMBER 1995, VOL. 59, PP. 573-576
Japan
 
  • Honshu Island
    • Tohoku Region
      • Aomori Prefecture
        • Minami-Tsugaru-gun
          • Ikarigaseki
Minerals in Japan, p. 248 (Field Best Encyclopedia, vol. 15) ; Mineralogical Magazine (1998) 62, 793-799
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
Peru
 
  • Cajamarca Department
    • Yanacocha District
      • Yanacocha Mine
Deditius, A.P., Utsunomiya, S., Sanchez-Alfaro, P., Reich, M., Ewing, R.C., Kesler, S.E. (2015): Constraints on Hf and Zr mobility in high-sulfidation epithermal systems: formation of kosnarite, KZr2(PO4)3, in the Chaquicocha gold deposit, Yanacocha district, Peru. Mineralium Deposita, 50, 429-436.
  • La Libertad Department
    • Santiago de Chuco Province
      • Quiruvilca District
Min.Rec. 28, #4 (1997)
  • Pasco department
    • Pasco province
[Amer.Min.(1939) 24, 136; www.johnbetts-fineminerals.com]
      • Simón Bolívar District
Mine is well know for Gratonite and I saw 20 foot benches of pyrite in the open pit. [Rock Currier]
Poland
 
  • Upper Silesia (Śląskie)
    • Bytom District (Beuthen)
P. Ramdohr, Ore Mineralogy, 3rd ed., pg 1128; Eligiusz Szełęg collection
    • Tarnowskie Góry district
      • Tarnowskie Góry (Tarnowitz)
Pieczonka, J. (2010): Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline. Mineralogia: 41(1-2), 35-53
Serbia
 
  • Podrinje District
Slobodan A. Radosavljević, Jovica N. Stojanović, Ana S. Radosavljević-Mihajlović, Vladan D. Kašić (2013): Polymetallic mineralization of the Boranja orefield, Podrinje Metallogenic District, Serbia: zonality, mineral associations and genetic features. Periodico di Mineralogia, 82, 61-87.
      • Krupanj
Slobodan A. Radosavljević, Jovica N. Stojanović, Aleksandar M. Pačevski, Hg-bearing sphalerite from the Rujevac polymetallic ore deposit, Podrinje Metallogenic District, Serbia: Compositional variations and zoning, Chemie der Erde - Geochemistry, Volume 72, Issue 3, September 2012, Pages 237-244, ISSN 0009-2819, 10.1016/j.chemer.2011.12.003.
Spain
 
  • Andalusia
    • Huelva
      • Minas de Riotinto
        • Rio Tinto Mines (Riotinto Mines)
Calvo, M. et al.(1999). Bocamina (4), 50-86
Calvo, M. (2003) Minerales y Minas de España. Vol II. Sulfuros y sulfosales. Museo de Ciencias Naturales de Alava. Vitoria. 705 págs.
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld)
Huff, R. C.; Huff, R. G.; Vajdak, J. (2000): Gratonite, an unexpected contribution to the sulfosalt mineralogy of Lengenbach. Rocks and Minerals, 75 (3), 174-175.
Taiwan
 
  • Taiwan Province
    • New Taipei City
      • Ruifang District
        • Chinkuashih Mine (Jinguashi Mine; Kinkwaseki Mine; Kinkaseki Mine)
Hwang, J. Y and Meyer, H O A (1982) The Mineral Chemistry and Genesis of the Chinkuashih ore deposits, Taiwan. Proceedings of the Geological Society of China 25:88-101
USA
 
  • Idaho
    • Lemhi Co.
      • Blue Wing District
        • Patterson
R&M 70:4 pp 242-263
  • Nevada
    • Eureka Co.
      • Lynn District
        • Elko
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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