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Gratonite

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Excelsior Mine, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru
© Rob Lavinsky

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Formula:
Pb
 
9
As
 
4
S
 
15
System:TrigonalColour:Dark lead-gray
Hardness:2½
Name:For Louis Caryl Graton (1880-1970), Professor of Mining Geology, Harvard University.
This page provides mineralogical data about Gratonite.

Classification of Gratonite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/E.15-30
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:3.3.2.1

3 : SULFOSALTS
3 : 3 <ø < 4
Hey's CIM Ref.:5.6.5

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

Type Locality:Excelsior Mine, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru
Year of Discovery:1939

Occurrences of Gratonite

Geological Setting:Hydrothermal copper deposits

Physical Properties of Gratonite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Dark lead-gray
Streak:Black
Hardness (Mohs):2½
Hardness (Vickers):VHN100=130 - 146 kg/mm2
Hardness Data:Measured
Tenacity:Brittle
Density (measured):6.22(2) g/cm3
Density (calculated):6.17 g/cm3

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.
Crystal Atlas:
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Gratonite - {110}, {021}

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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
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:
Pb
 
9
As
 
4
S
 
15
Essential elements:As, Pb, S
All elements listed in formula:As, Pb, S
Common Impurities:Fe,Sb

Relationship of Gratonite to other Species

Common Associates:
RealgarPyriteSphaleriteEnargiteTetrahedrite
JordaniteHutchinsonite
Related Minerals - Nickel-Strunz Grouping):

- +
2.JB.05Diaphorite
Ag
 
3
Pb
 
2
Sb
 
3
S
 
8
2.JB.10Cosalite
Pb
 
2
Bi
 
2
S
 
5
2.JB.15Freieslebenite
AgPbSbS
 
3
2.JB.15Marrite
AgPbAsS
 
3
2.JB.20Cannizzarite
Pb
 
4
Bi
 
6
S
 
13
2.JB.20Wittite
Pb
 
9
Bi
 
12
(S,Se)
 
27
2.JB.25aJunoite
Cu
 
2
Pb
 
3
Bi
 
8
(S,Se)
 
16
2.JB.25iNeyite
Ag
 
2
Cu
 
6
Pb
 
25
Bi
 
26
S
 
68
2.JB.25cNordströmite
CuPb
 
3
Bi
 
7
(Se
 
4
S
 
10
)
2.JB.25gNuffieldite
Pb
 
2
Cu(Pb,Bi)Bi
 
2
S
 
7
2.JB.25dProudite
CuPb
 
7.5
Bi
 
9.33
(S,Se)
 
22
2.JB.25hWeibullite
Pb
 
5
Bi
 
8
Se
 
7
S
 
11
2.JB.25bFelbertalite
Cu
 
2
Pb
 
6
Bi
 
8
S
 
19
2.JB.25jRouxelite
Cu
 
2
HgPb
 
23
Sb
 
27
S
 
65.5
2.JB.25fÁngelaite
Cu
 
2
AgPbBiS
 
4
2.JB.25iCuproneyite
Cu
 
7
Pb
 
27
Bi
 
25
S
 
68
2.JB.30aGeocronite
Pb
 
14
(Sb,As)
 
6
S
 
23
2.JB.30aJordanite
Pb
 
14
(As,Sb)
 
6
S
 
23
2.JB.30bKirkiite
Pb
 
10
Bi
 
3
As
 
3
S
 
19
2.JB.30cTsugaruite
Pb
 
4
As
 
2
S
 
7
2.JB.35cPillaite
Pb
 
9
Sb
 
10
S
 
23
ClO
 
0.5
2.JB.35aZinkenite
Pb
 
9
Sb
 
22
S
 
42
2.JB.35bScainiite
Pb
 
14
Sb
 
30
S
 
54
O
 
5
2.JB.35dPellouxite
(Cu,Ag)Pb
 
10
Sb
 
12
S
 
27
O(Cl,S)
 
0.6
2.JB.40bAschamalmite
Pb
 
6
Bi
 
2
S
 
9
2.JB.40aBursaite
Pb
 
5
Bi
 
4
S
 
11
2.JB.40bEskimoite
Ag
 
7
Pb
 
10
Bi
 
15
S
 
36
2.JB.40aFizélyite
Ag
 
5
Pb
 
14
Sb
 
21
S
 
48
2.JB.40aGustavite
Ag
 
3
Pb
 
5
Bi
 
11
S
 
24
2.JB.40aLillianite
Pb
 
3
Bi
 
2
S
 
6
2.JB.40cOurayite
Ag
 
3
Pb
 
4
Bi
 
5
S
 
13
2.JB.40aRamdohrite
(Cd,Mn,Fe)Ag
 
5.5
Pb
 
12
Sb
 
21.5
S
 
48
2.JB.40aRoshchinite
Ag
 
19
Pb
 
10
Sb
 
51
S
 
96
2.JB.40dSchirmerite
AgPb
 
2
Bi
 
3
S
 
7
2.JB.40aTreasurite
Ag
 
7
Pb
 
6
Bi
 
15
S
 
32
2.JB.40aUchucchacuaite
AgMnPb
 
3
Sb
 
5
S
 
12
2.JB.40eUstarasite
Pb(Bi,Sb)
 
6
S
 
10
 (?)
2.JB.40aVikingite
Ag
 
5
Pb
 
8
Bi
 
13
S
 
30
2.JB.40aXilingolite
Pb
 
3
Bi
 
2
S
 
6
2.JB.40bHeyrovskýite
Pb
 
10
AgBi
 
5
S
 
18
2.JB.40UM1988-05-S:AgBiCuHgPb
(Hg,Ag,Cu,Pb)
 
5
Pb
 
5
Bi
 
11
S
 
27
2.JB.40UM1988-06-S:AgBiCuHgPb
(Pb,Hg)
 
12
(Cu,Ag)
 
3
(Bi,Sb)
 
10
(S,Te)
 
27
2.JB.40aAndorite IV
Pb
 
18
Ag
 
15
Sb
 
47
S
 
96
2.JB.60Marrucciite
Hg
 
3
Pb
 
16
Sb
 
18
S
 
46
2.JB.65Vurroite
Pb
 
20
Sn
 
2
(Bi,As)
 
22
S
 
54
Cl
 
6
Related Minerals - Hey's Index Grouping:

- +
5.6.1Sartorite
PbAs
 
2
S
 
4
5.6.2Dufrénoysite
Pb
 
2
As
 
2
S
 
5
5.6.3Liveingite
Pb
 
9
As
 
13
S
 
28
5.6.4Baumhauerite
Pb
 
3
As
 
4
S
 
9
5.6.6Jordanite
Pb
 
14
(As,Sb)
 
6
S
 
23
5.6.7Fülöppite
Pb
 
3
Sb
 
8
S
 
15
5.6.8Zinkenite
Pb
 
9
Sb
 
22
S
 
42
5.6.9Plagionite
Pb
 
5
Sb
 
8
S
 
17
5.6.10Heteromorphite
Pb
 
7
Sb
 
8
S
 
19
5.6.11Launayite
Pb
 
22
Sb
 
26
S
 
61
5.6.12Playfairite
Pb
 
16
Sb
 
18
S
 
43
5.6.13Semseyite
Pb
 
9
Sb
 
8
S
 
21
5.6.14Madocite
Pb
 
17
Sb
 
16
S
 
41
5.6.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
5.6.17Robinsonite
Pb
 
4
Sb
 
6
S
 
13
5.6.18Guettardite
Pb(Sb,As)
 
2
S
 
4
5.6.19Twinnite
Pb(Sb,As)
 
2
S
 
4
5.6.20Veenite
Pb
 
2
(Sb,As)
 
2
S
 
5
5.6.21Sorbyite
CuPb
 
9
(Sb,As)
 
11
S
 
26
5.6.22Geocronite
Pb
 
14
(Sb,As)
 
6
S
 
23
5.6.23Galenobismutite
PbBi
 
2
S
 
4
5.6.24Cosalite
Pb
 
2
Bi
 
2
S
 
5
5.6.25Cannizzarite
Pb
 
4
Bi
 
6
S
 
13
5.6.26Lillianite
Pb
 
3
Bi
 
2
S
 
6
5.6.27Giessenite
Pb
 
27
Cu
 
2
(Bi,Sb)
 
19
S
 
57
5.6.28 Platynite
5.6.29Xilingolite
Pb
 
3
Bi
 
2
S
 
6
5.6.30Weibullite
Pb
 
5
Bi
 
8
Se
 
7
S
 
11
5.6.31Wittite
Pb
 
9
Bi
 
12
(S,Se)
 
27
5.6.32Kirkiite
Pb
 
10
Bi
 
3
As
 
3
S
 
19
5.6.33Ustarasite
Pb(Bi,Sb)
 
6
S
 
10
 (?)

Other Names for Gratonite

Other Languages:
German:Gratonit
Japanese:グラトン鉱
Spanish:Gratonita

Other Information

Health Warning: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. and Fisher (1939), American Mineralogist: 24: 136.

Palache, C. and Fisher (1940), American Mineralogist: 25: 255-270.

Palache, Charles, Harry Berman & Clifford Frondel (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.

Zeitschrift für Kristallographie: 128: 321-338.

Internet Links for Gratonite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Gratonite details from Handbook of Mineralogy (PDF)
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    • Localities for Gratonite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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
      • Uspallata
    		Schalamuk, I.B. et al (1994) Revista del Museo de La Plata
    Canada
     
    • Ontario
      • Hastings Co.
        • Huntingdon Township
          • Madoc
    		Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Lahr
          • Reichenbach
    		Lapis 21(12), 42 (1996)
      • Heidelberg
        • Wiesloch
    		P. Ramdohr, Ore Mineralogy, 3rd ed., pg 1159
    Ireland
     
    • Co. Tipperary
      • Moyne
    		Econ Geol (2005) 100:63-86
    Isle of Man
     
    • Laxey
    		No reference listed
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Aomori Prefecture
          • Minami-Tsugaru-gun
    		Minerals in Japan, p. 248 (Field Best Encyclopedia, vol. 15) ; Min.Mag. (1998) 62, 793-799
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • 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
     
    • La Libertad Department
      • Santiago de Chuco Province
        • Quiruvilca District
    		Min.Rec. 28, #4 (1997)
    • Pasco Department
      • Daniel Alcides Carrión Province
    [Amer.Min.(1939) 24, 136; www.johnbetts-fineminerals.com]
      • Pasco Province
        • 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 (Beuthen) District
    		P. Ramdohr, Ore Mineralogy, 3rd ed., pg 1128
    Spain
     
    • Andalusia
      • Huelva
        • Minas de Riotinto
          • Rio Tinto Mines
    		Calvo, M. et al.(1999). Bocamina (4), 50-86
    Jean Francois Carpentier
    Taiwan
     
    • Taiwan Province
      • Taipei Co.
        • Jui-Fang Town
    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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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 13:13:43
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