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Jacobsite

Big Photo

Ejectum-1982-001, Pumice quarries, Wingertsberg Mt., Niedermendig, Mendig, Laach lake volcanic complex, Eifel Mts, Rhineland-Palatinate, Germany
© C.H.M.-Schäfer

Show Jacobsite Photos (8)
Formula:
Mn
2+
 
Fe
3+
2
O
 
4
System:IsometricColour:Black, grey in reflected ...
Lustre:Sub-MetallicHardness:5½ - 6½
Name:After the type locality of Jakobsberg, Sweden.


Spinel Group, Fe series. Jacobsite-Magnetite Series.

Classification of Jacobsite

IMA status:Approved
Strunz 8th edition ID:4/B.02-30
Nickel-Strunz 10th (pending) edition ID:4.BB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
Dana 8th edition ID:7.2.2.2

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.19.3

7 : Oxides and Hydroxides
19 : Oxides of Mn and Fe
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Type Occurrence of Jacobsite

Type Locality:Jakobsberg Mine, Nordmark, Filipstad, Värmland, Sweden
Year of Discovery:1869

Physical Properties of Jacobsite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Black, grey in reflected light
Streak:Reddish black
Hardness (Mohs):5½ - 6½
Tenacity:Brittle
Density (measured):4.76 g/cm3
Density (calculated):5.03 g/cm3

Crystallography of Jacobsite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m (F41/d 3 2/m)
Cell Parameters:a = 8.457Å
Unit Cell Volume:V 604.85 ų (Calculated from Unit Cell)
Morphology:Octahedral. Rarely found as crystals. Massive, granular.
Crystal Atlas:
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Jacobsite no.1 - Goldschmidt (1913-1926)
Jacobsite no.6 - Goldschmidt (1913-1926)

About Crystal Atlas

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Epitaxial Relationships of Jacobsite

Epitaxial Minerals:
Hausmannite
Epitaxi Comments:Oriented intergrowths (Vredenbergite).

Optical Data of Jacobsite

Type:Isotropic
Type:Isotropic
Colour in reflected light:Grey-white with olive tint
Internal Reflections:Brown

Chemical Properties of Jacobsite

Formula:
Mn
2+
 
Fe
3+
2
O
 
4
Essential elements:Fe, Mn, O
All elements listed in formula:Fe, Mn, O
Common Impurities:Zn

Relationship of Jacobsite to other Species

Series:Forms a series with Magnetite (see here)
Related Minerals - Nickel-Strunz Grouping):
4.BB.05Brunogeierite
(Ge,Fe)Fe
 
2
O
 
4
4.BB.05Chromite
FeCr
 
2
O
 
4
4.BB.05Cochromite
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
4.BB.05Coulsonite
FeV
 
2
O
 
4
4.BB.05Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
4.BB.05Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
4.BB.05Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
4.BB.05Gahnite
ZnAl
 
2
O
 
4
4.BB.05Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
4.BB.05Hercynite
FeAl
 
2
O
 
4
4.BB.05Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
4.BB.05Magnesiocoulsonite
MgV
 
2
O
 
4
4.BB.05Magnesiochromite
MgCr
 
2
O
 
4
4.BB.05Magnesioferrite
MgFe
3+
2
O
 
4
4.BB.05Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
4.BB.05Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
4.BB.05Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
4.BB.05Spinel
MgAl
 
2
O
 
4
4.BB.05Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
4.BB.05Ulvöspinel
Fe
 
2
TiO
 
4
4.BB.05Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
4.BB.05Zincochromite
ZnCr
 
2
O
 
4
4.BB.05Tegengrenite
(Mg,Mn
2+
 
)
 
2
Sb
5+
0.5
(Mn
3+
 
,Si,Ti)
 
0.5
O
 
4
4.BB.10Hausmannite
MnMn
 
2
O
 
4
4.BB.10Hetaerolite
ZnMn
 
2
O
 
4
4.BB.10Hydrohetaerolite
ZnMn
 
2
O
 
4
·H
 
2
O
4.BB.10Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
4.BB.15Maghemite
Fe
 
2
O
 
3
4.BB.15Titanomaghemite
Fe
3+
 
(Fe
3+
 
,Ti
4+
 
,Fe
2+
 
,[])
 
2
O
 
4
Related Minerals - Hey's Index Grouping:
7.19.1Bixbyite
(Mn
3+
 
,Fe
3+
 
)
 
2
O
 
3
7.19.2Janggunite
Mn
 
5-x
(Mn,Fe)
 
1+x
O
 
8
(OH)
 
6
7.19.4Vernadite
(Mn
4+
 
,Fe
3+
 
,Ca,Na)(O,OH)
 
2
 · nH
 
2
O
7.19.5Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
7.19.6Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
7.19.7Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
7.19.8Zenzénite
Pb
 
3
(Fe,Mn)
 
4
Mn
 
3
O
 
13

Other Names for Jacobsite

Synonyms:
German names:
JacobsitJakobsit
Russian names:
Якобсит
Spanish names:
Jacobsita

Other Information

Fluorescence in UV light:None
Magnetism:Diamagnetic
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 Jacobsite

Reference List:Damour (1869), C.R.: 69: 168.

Flink (1886), Ak. Stockholm Bh.: 12(2): 2, 20.

Fermor (1909), Geological Survey of India, Rcords: 37: 199.

Johansson (1928), Zs. Kr.: 68: 107.

Orcel and Pavlovitch (1932), Bull. soc. min.: 54: 108.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 698-707.

Journal of Physics and Chemistry of Solids (1962): 23: 1661.

Essene, E.J. and Peacor, D.R. (1983) Crystal chemistry and petrology of coexisting galaxite and jacobsite and other spinel solutions and solvi. American Mineralogist: 68: 449-455.

Articles/Blogs about Jacobsite

Internet Links for Jacobsite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Jacobsite in the Natural History Museum (London) online catalogue
  • Jacobsite details from Handbook of Mineralogy (PDF)
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    Localities for Jacobsite

    Hide Locality List
    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.
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    (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.
    Australia
     
    • New South Wales
      • Yancowinna Co.
    		No reference listed
    • South Australia
      • Eyre peninsula
        • Middleback Range
          • Iron Knob
    		No reference listed
    Austria
     
    • Salzburg
      • Hohe Tauern Mts
        • Kaprun valley
          • Mooserboden reservoir
    		A. Strasser: Die Minerale Salzburgs (1989)
      • Lungau
        • Taurach valley
          • Fuchs Alp - Fuchs lake area (incl. Schwarz Alp; Schwarz lake; Kohlsberg Alp)
    		A. Strasser: Die Minerale Salzburgs (1989)
    • Styria
      • Mitterdorf
        • Veitsch
          • Kleinveitsch
            • Kaiblinggraben
    		http://geocities.com/franz_bernhard/polishedslabs.html
    • Tyrol
      • East Tyrol
        • Kals valley
          • Ködnitz valley
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    China
     
    • Guangxi Zhuang Autonomous Region
      • Chongzuo Prefecture
        • Daxin Co.
    		Dairong Yan, Jianwei Li, Mingan Hu, and Yinsheng Lang (2006): Geological Science and Technology Information 25(3), 61-67.
    • Liaoning Province (Manchuria; Dongbei Region)
      • Chaoyang Prefecture
        • Chaoyang Co.
    		Fan Delian, Li Jiaju, Ye Jie, Hariya, Y., and Miura, H. (1992): Some new data on manganese silicate-manganese oxide ores from ferro-manganese ore deposit Wafangzi, PRC (abstract). 29th international geological congress (Kyoto, 24 August - 3 September 1992).
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Kutná Hora (Kuttenberg)
    		No reference listed
    France
     
    • Midi-Pyrénées
      • Haute-Garonne
        • Argut-Dessus
    		 Inventaire minéralogique de la France numero 8 Haute Garonne pages 20 et 21
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Laach lake volcanic complex
          • Kruft
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
          • Mendig
            • Niedermendig
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
    [Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987] [Mineralien Welt 1/93:14]
              • Wingertsberg Mt.
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
    Hentschel, G.,(1987): Die Mineralien der Eifelvulkane, Weise Verlag, München
        • Mayen
          • Ettringen
    		[Blass, G., Graf, H.W., Über neue Mineralien vom Bellerberg, Eifel Mineralien-Welt 5/6, 53, 1994] [A. Wittern: Mineralfundorte in Deutschland, Schweizerbart (Stuttgart), 2001]
    Ghana
     
    • Western Province
      • Tarkwa
    		Mineralium Deposita Volume 34 Issue 3 (1999) pp 297-311
    India
     
    • Karnataka
      • Bellary-Hospet iron belt
        • Sandur
    		Rao, J. S. R. K., Naidu, B. V. & Rao, K. V. (1979): Ore microscopic, x-ray and trace elemental data on manganese ores from Sandur, Karnataka, India. Acta Mineralogica-Petrographica 24, 91-97.
    • Madhya Pradesh
      • Jhabua District
    		Am Min 90:2-3 pp304-309
    • Orissa
      • Koraput District
    		Mineralium Deposita (1997) 32 (1), 79-93
    Israel
     
    AmMin 45:734
    Italy
     
    • Aosta Valley
      • Saint-Marcel
    		Eur. J. Mineral 18:569–582 (2006)
    • Lombardy
      • Sondrio Province
        • Malenco Valley
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Aichi Prefecture
          • Kita-Shidara-gun
            • Shidara
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
        • Nagano Prefecture
          • Kami-Ina-gun
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
      • Kanto Region
        • Gunma Prefecture
          • Kiryuu City
    		Minerals in Japan (Field Best Encyclopedia V. 15, 2003)
    Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
        • Saitama Prefecture
          • Chichibu City
            • Urayama
    		K. Nishikubo, T. Yamada, A. Harada, M. Takizawa, K. Tange, Y. Kosuge, R. Miyawaki, and S. Matsubara (2005) "Rambergite from the Hirogawara mine, Urayama, Chichibu City, Saitama Prefecture, Japan"
        • Tochigi Prefecture
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
          • Kanuma
        • Tokyo Prefecture
          • Nishi-Tama-gun
            • Okutama
    		N. Aikawa (1987) Journal of Geosciences, Osaka City University, 30, 1-13.
      • Kinki Region
        • Kyoto Prefecture
          • Kita-Kuwata-gun
    		Masutomi Museum specimens (Kyoto)
          • Sohraku-gun
        • Shiga Prefecture
    		No reference listed
      • Tohoku Region
        • Iwate Prefecture
    		Tanida, K. & Kitamura, T. (1982) Mineralogy and thermal transformation of kutnahorite from Fujikura mine, Iwate Prefecture, with the subsolidus relation of system CaO-manganese oxide…. J. Japan Ass. Min. Petr. & Econ. Geol., 77, 227-234
    Nambu ore collection (curated at Geological Survey of Japan)
    Watanabe, T. (1959) Mineralogical Journal, 2, 6, 408-421
    Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
          • Shimohei-gun
    		Dr. Matsuo Nambu collection (curated by the Geological Survey of Japan)
    Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    • Shikoku Island
      • Kochi Prefecture
    		Takabatake, A. (1956) Symposium sobre yacimientos de manganeso. Vol. 4, 207ff (Mexico, 1956)
    Kazakhstan
     
    • Atasu - Karazhal - Zhayrem area
    		Kayupova, M.M. (1965) Doklady of the Academy of Sciences U.S.S.R., Earth Science sections, 163, 97-100.
    Frank Dzubeck
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
    		No reference listed
    Namibia
     
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    		Mineralogical Record: 22: 421.
    Norway
     
    • Nordland
      • Lofoten
        • Lødingen
          • Hinnøya (Iinnasuolu)
    		Krogh (1975, p. 79 and 1977, pp. 245-246); Neumann (1985, p. 57).
    • Telemark
      • Tokke
        • Botnedal
    		Westerveld (1961, p. 215); Van der Wel (1974, p. 82); Neumann (1985, p. 57).
    Republic of Macedonia
     
    • Kratovo-Zletovo ore District
    		Bulletin of the Chemists and Technologists of Macedonia, Vol. 23, No. 2, pp. 171–184 (2004)
    Slovakia
     
    • Košice Region
      • Eastern Slovenské Rudohorie Mts
    		Pauliš P., Ďuďa R., 2002:Nejznámejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 136p
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		MinRecord 9:137-153
    Minerals of South Africa
        • N'Chwaning Mines
    		Minerals of South Africa
    Sudan
     
    • Al Bahr al Ahmar Wilayah
      • Red Sea Hills
        • Derudeb District
    		http://www.gras-sd.com/products/bro_basemetel.htm
    Sweden
     
    • Dalarna
      • Hedemora
        • Garpenberg
    		Min Mag 66 (2) 2002, 353-364
    • Dalsland
      • Åmål
        • Strandhem ore field
    		K.Gatedal
    • Värmland
      • Filipstad
    		Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
        • Nordmark
    		Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy, (7th edition), v. I, 698–707.
    Mineralogical Magazine (1998) 62 (3), 395-407
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 778.
        • Pajsberg
    		Kjell Gatedal
    No reference listed
    • Västmanland
      • Hällefors
        • Grythyttan
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 857.
      • Lindesberg
    No reference listed
    Holtstam, D. (1997): Barian magnetoplumbite from Mangruvan, Orebro, Sweden. GFF 119, 17-19.
      • Norberg
    Switzerland
     
    • Wallis (Valais)
      • Turtmann Valley
      • Zermatt - Saas Fee area
        • Matt Valley
          • Täsch Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 30-31
    UK
     
    • Wales
      • Gwynedd (Caernarvonshire)
        • Lleyn Peninsula
          • Llanfaelrhys
            • Nant-y-Gadwen
    		Cotterell, T.F., 2006. Caryopilite and pyroxmangite from Nant Mine, Nant-y-Gadwen, Llanfaelrhys, Pen Llyn, Gwynedd, Wales UK Journal of Mines and Minerals, 27, 51-53.
            • Rhiw
    		No reference listed
    USA
     
    • Arizona
      • Cochise Co.
        • Mule Mts
          • Warren District
            • Bisbee
              • Escabrosa Ridge
    		Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 5.
    • Connecticut
      • Middlesex Co.
        • Haddam
    		Rocks & Min.: 70:403
    • Georgia
      • Cherokee Co.
        • Woodstock
    		Rocks & Min.:64:189; Shearer & Hull(1918).
    • Massachusetts
      • Hampshire Co.
        • Plainfield
    		"Western Massachusetts Mineral Localities" by Alan Plante, Valley Geology Press, 1992.
    • Michigan
    		www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
        • Marquette iron range
          • Champion
    		Rocks & Min.:58:111 & 61:328.
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Frondel, C. & Klein,C., Jr.: Am.Min.:50:1670-1680 (1965); McSween, H.Y., Jr.: Econ. Geology:71:814-817 (1976); Dunn(1995):Pt4:581-582.
    • North Carolina
      • Alleghany Co.
        • Sparta
          • Bald Knob
    		Rocks & Min.: 60:130-135.
    • Virginia
      • Pittsylvania Co.
        • James River-Roanoke River Mn-Fe-Ba District
    		AmMin 88:740-747 (2003)
    • Washington
      • Clallam Co.
        • Sappho
    		Minerals of Washington, Bart Cannon, 1975
        • Snyder Ranger Station
          • Littleton Creek
    		Minerals of Washington, Bart Cannon, 1975
      • Jefferson Co.
        • Mount Claywood
    		 Minerals of Washington, Bart Cannon 1975
        • Mount Jupiter
          • Elkhorn Group
    		Minerals of Washington, Bart Cannon, 1975
    Minerals of Washington, Bart Cannon, 1975
      • Mason Co.
        • Copper Creek (Boulder Creek)
    		Minerals of Washington, Bart Cannon, 1975
        • Hoodsport
          • Lake Cushman
    		Minerals of Washington, Bart Cannon, 1975
    Mineral and/or Locality
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