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Bartonite

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Big Photo

Coyote Peak, Coastal Range, Humboldt Co., California, USA
© 2008, JGW

Show Bartonite Photos (2)



Formula:
K
 
6
Fe
 
20
S
 
26
S
System:TetragonalColour:Blackish-brown
Lustre:Sub-MetallicHardness:3½
Name:After Paul Booth Barton, Jr. (1930– ), ore petrologist with the U.S. Geological Survey.


Structurally related to djerfisherite and pentlandite.

See also chlorbartonite.

Classification of Bartonite

IMA status:Approved
Strunz 8th edition ID:2/F.07-20
Nickel-Strunz 10th (pending) edition ID:2.FC.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
Dana 8th edition ID:2.9.19.1

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
Hey's CIM Ref.:3.0.5

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
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Type Occurrence of Bartonite

Type Locality:Coyote Peak, Coastal Range, Humboldt Co., California, USA
General Appearance of Type Material:Anhedral masses, intergrown with pyrrhotite; rare elongated single crystals, to 50 μm long.
Place of Conservation of Type Material:Smithsonian
Year of Discovery:1978
Geological Setting of type material:Alkalic diatreme
Associated Minerals at type locality:
RasvumiteDjerfisheriteErditePyrrhotitePyrite
SphaleriteLöllingiteMagnetiteNephelinePhlogopite

Physical Properties of Bartonite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Blackish-brown
Streak:Black
Hardness (Mohs):3½
Hardness (Vickers):VHN15=94 - 120 kg/mm2
Cleavage:Distinct/Good
Distinct on {112}
Fracture:Conchoidal
Density (measured):3.305 g/cm3
Density (calculated):3.286 g/cm3

Crystallography of Bartonite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:I4/mmm {I4/m 2/m 2/m}
Space Group Setting:I4/mmm
Cell Parameters:a = 10.424(1) Å, c = 20.626(1) Å
Ratio:a:c = 1 : 1.979
Unit Cell Volume:V 2,241.22 ų (Calculated from Unit Cell)
Z:2
Morphology:Anhedral masses in pyrrhotite to 5x50 microns
X-Ray Powder Diffraction:
d-spacingIntensity
9.31 (27)
5.99 (77)
3.139 (27)
2.998 (100)
2.379 (25)
1.841 (25)
1.833 (40)
Comments:Coyote Peak, California, USA.

Optical Data of Bartonite

Type:Anisotropic
Reflectivity:
400nmR1=21.7%R2= 18.3%
420nmR1=16.7%R2= 14.4%
440nmR1=17.7%R2= 17.2%
460nmR1=18.4%R2= 18.6%
480nmR1=19.4%R2= 19.5%
500nmR1=19.7%R2= 20.6%
520nmR1=20.3%R2= 21.4%
540nmR1=20.9%R2= 21.8%
560nmR1=21.9%R2= 22.7%
580nmR1=22.7%R2= 23.2%
600nmR1=23.4%R2= 23.7%
620nmR1=23.9%R2= 24.3%
640nmR1=24.7%R2= 25.1%
660nmR1=25.0%R2= 25.5%
680nmR1=25.2%R2= 26.1%
700nmR1=26.4%R2= 26.5%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 26.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:Yellowish green-gray to yellowish green-brown
Pleochroism:Weak

Chemical Properties of Bartonite

Formula:
K
 
6
Fe
 
20
S
 
26
S
Essential elements:Fe, K, S
All elements listed in formula:Fe, K, S
Analytical Data:Coyote Peak, California, USA; by electron microprobe.
K (9.54)
Na (0.05)
Fe (51.2)
Cu (0.62)
Ni (0.19)
Co (0.11)
S (38.4)
Cl (0.02)
Total (100.13)
Empirical Formula:
(K
 
2.78
Na
 
0.07
)(Fe
 
10.46
Cu
 
0.10
Ni
 
0.04
Co
 
0.02
)S
 
13.46
Common Impurities:Na,Cu,Ni,Co,Cl

Relationship of Bartonite to other Species

Structurally related to group(s):
Djerfisherite Group
Related Minerals - Nickel-Strunz Grouping):

- +
2.FC.05Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl
2.FC.05Thalfenisite
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl
2.FC.05Owensite
(Ba,Pb)
 
6
(Cu,Fe,Ni)
 
25
S
 
27
2.FC.10Chlorbartonite
K
 
6
Fe
 
24
S
 
26
(Cl,S)
2.FC.15aArzakite
Hg
2+
3
S
 
2
(Br,Cl)
 
2
2.FC.15aCorderoite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.15cGrechishchevite
Hg
2+
3
S
 
2
(Br,Cl,I)
 
2
2.FC.15aLavrentievite
Hg
2+
3
S
 
2
(Cl,Br)
 
2
2.FC.15dRadtkeite
Hg
2+
3
S
 
2
ICl
2.FC.15bKenhsuite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.20aCapgaronnite
HgAgS(Cl,Br,I)
2.FC.20cPerroudite
Hg
 
5
Ag
 
4
S
 
5
(I,Br)
 
2
Cl
 
2
2.FC.20bIltisite
HgAgS(Cl,Br)
2.FC.25Demicheleite-(Br)
BiSBr
2.FC.25Demicheleite-(Cl)
BiSCl
Related Minerals - Hey's Index Grouping:

- +
3.0.1Erdite
NaFeS
 
2
 · 2H
 
2
O
3.0.2Coyoteite
NaFe
 
3
S
 
5
 · 2H
 
2
O
3.0.3Chvilevaite
Na(Cu,Fe,Zn)
 
2
S
 
4
3.0.4Rasvumite
KFe
 
2
S
 
3
3.0.6Murunskite
K
 
2
(Cu,Fe)
 
4
S
 
4

Other Names for Bartonite

Synonyms:
IMA1977-039
Other Languages:
German:Bartonit
Russian:Бартонит
Spanish:Bartonita

Other Information

Other Information:Weakly magnetic
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 Bartonite

Reference List:

- +
Fleischer, M. (1973), New mineral names. Cyclowollastonite: American Mineralogist: 58: 560.

American Mineralogist (1979): 64: 241.

Czamanske, G.K., R.C. Erd, B.F. Leonard & J.R. Clark (1981), Bartonite, a new potassium iron sulfide mineral: American Mineralogist: 66: 369-375.

Evans, H.T. & J.R. Clark (1981), The crystal structure of bartonite, a potassium iron sulfide and its relationship to pentlandite and djerfisherite: American Mineralogist: 66: 376-384.

Azarova, Yu.V., Krinov, D.I., Sokolova, M.N. (2006): Structural and genetic relationship of djerfisherite and bartonite and problem of isomorphism in the system djerfisherite-"Cu-djerfisherite"-bartonite. New Data on Minerals, 41, 98-107.

Internet Links for Bartonite

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  • Bartonite details from Handbook of Mineralogy (PDF)
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    • Localities for Bartonite

    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.
    Italy
     
    • Umbria
      • Terni Province
        • San Venanzo
    		Stoppa, F., Sharygin, V.V., and Cundari, A. (1997): Mineralogy and Petrology 61, 27-45.;
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Kedykverpakhk Mt
    		Mineralogical Record: 36(4): 397-416.
    USA
     
    • California
      • Humboldt Co.
        • Coastal Range
    		Czamanske, G.K., R.C. Erd, B.F. Leonard & J.R. Clark (1981), Bartonite, a new potassium iron sulfide mineral: American Mineralogist: 66: 369-375; Fleischer, M. (1979) New Mineral Names. Bartonite. American Mineralogist: 64: 241; Evans, H.T. and J.R. Clark (1981) The crystal structure of bartonite, a potassium iron sulfide and its relationship to pentlandite and djerfisherite. American Mineralogist: 66: 376-384; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 67; American Mineralogist: (1983) 68: 245-254.
    • Nevada
      • Nye Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
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