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Jahnsite Group

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Group of complex monoclinic phosphates.
See also the closely related Whiteite Group.

Classification of Jahnsite Group

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Relationship of Jahnsite Group to other Species

Group Members:
Jahnsite-(CaFeFe)
{Ca}{Fe
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(CaMnFe)
{Ca}{Mn
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(CaMnMg)
{Ca}{Mn
2+
 
}{(Mg,Fe
2+
 
)
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(CaMnMn)
{Ca}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(MnMnMn)
{Mn
2+
 
}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(NaFeMg)
NaFe
3+
 
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Jahnsite-(NaMnMg)
{Na}{Mn
3+
 
}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
Keckite
CaMn
2+
 
Fe
3+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
3
(H
 
2
O)
 
7

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.

Internet Links for Jahnsite Group

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  • Localities for Jahnsite Group

    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.
    (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
     
    • South Australia
      • Eyre Peninsula
        • Middleback Range
          • Iron Knob
    [Jahnsite-(CaMnMn)] Australian Jour.Min. v.6, no. 1
    • Victoria
      • East Gippsland Shire
        • Omeo
          • Mt Wills Mining District
            • Glen Wills
    [Keckite] Dr. Bill Birch - Museum Victoria
    Austria
     
    • Carinthia
      • Koralpe
        • Moschkogel - Weinebene area
          • Brandrücken
    [Jahnsite-(CaMnMg)] J. Taucher, B. Moser, W. Postl, F. Brandstätter: Carinthia II 182./102.:115-124 (1992)
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Galiléia
          • Sapucaia do Norte
    [Jahnsite-(CaMnFe)] Cassedanne, J.P. & Baptista, A. (1999): Famous Mineral Localities: The Sapucaia Pegmatite Minas Gerais, Brazil. Mineralogical Record, 30: 347-360 + 365
      • Jequitinhonha valley
        • Itinga
    [Jahnsite-(CaMnMg)] Van King
    Democratic Republic of Congo (Zaïre)
     
    • Sud-Kivu
      • Lusungu River District
    [Keckite] Mills, S. J., Birch, W. D., Kampf, A. R. & van Wambeke, L. (2010) Kobokoboite, Al6(PO4)4(OH)6•11H2O, a new mineral from the Kobokobo pegmatite, Democratic Republic of the Congo. European Journal of Mineralogy, 22(2)
    Finland
     
    • Western and Inner Finland Region
      • Orivesi
        • Eräjärvi area
    [Jahnsite-(CaMnFe)] Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
    Germany
     
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Zwiesel
            • Rabenstein
    [Keckite] Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    [Jahnsite-(CaMnFe)] Christian Rewitzer collection (analysed by EPMA and Moessbauer spectroscopy).
    [Keckite] Wittern: "Mineralfundorte in Deutschland", 2001
    Italy
     
    • Lombardy
      • Lecco Province
        • Colico
    [Jahnsite-(CaMnFe)] Vignola, P., Fransolet, A.M., Guastoni, A. & Appiani, R. (2011). Le pegmatiti di Piona. Recenti studi sui filoni Malpensata, Luna e Sommafiume. Rivista Mineralogica Italiana, 1/2011, 30-38
        • Vestreno
    [Jahnsite-(CaMnFe)] Vignola et al. (2011): Complex mechanisms of alteration in a graftonite + sacropside+ triphylite association from the Luna pegmatite, Piona, Lecco Province, Italy. Canadian Mineralogist. 49, 765-776.
    Japan
     
    • Honshu Island
      • Kinki region
        • Hyogo prefecture
          • Kobe city
    [Jahnsite-(CaFeFe)] Ganko-Gakkai Koen-Yoshi (Abstracts of the Meetings of Japanese Association of Mineralogists...) (in japanese) 40 (1995)
    Portugal
     
    • Guarda District
      • Gouveia
        • Folgosinho
    [Keckite]
      • Sabugal
    [Jahnsite-(CaMnMn)] Sopas de Pedra, A. M. Galopim de Carvalho, Gradiva, Lisbon, Portugal
    • Viana do Castelo District
      • Ponte da Barca
        • Touvedo
    [Keckite] self-find by Nuno Afonso, optical and XRD analysed.
    • Viseu District
      • Mangualde
    [Jahnsite-(CaMnMn)] Am. Min.(1990), 75, 404-409
    sergio varvello
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    [Jahnsite-(CaMnFe)]
    Switzerland
     
    • Ticino (Tessin)
      • Lago Maggiore
        • Brissago
    [Jahnsite-(CaMnFe)] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 226.
    USA
     
    • California
      • San Diego Co.
        • Pala District
          • Pala
            • Tourmaline Queen Mountain (Pala Mtn; Queen Mtn)
    [Jahnsite-(MnMnMn)] Min Mag 42 (1978), 309
    • Maine
      • Cumberland Co.
        • Baldwin
    [Jahnsite-(CaMnMn)] No reference listed
      • Oxford Co.
        • Greenwood
          • Uncle Tom Mountain
    [Jahnsite-(MnMnMn)] Thompson, W, Joyner, D., Woodman, R., and King, V., 1998. Maine Mineral Localities, 3rd ed.; King and Foord, 1994, Mineralogy of Maine
        • Newry
    [Jahnsite-(CaMnFe)] King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed.), 2000, Mineralogy of Maine, V. 2.
    [Jahnsite-(CaMnFe)] King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
        • Paris
    [Jahnsite-(CaMnMn)] King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates. "Maine Mineral Localites, 3rd Ed." by Thompson, W.B., et.al. , 1998; Mineralogical Record 22:382
    [Jahnsite-(CaMnFe)]
        • Rumford
    [Jahnsite-(CaMnFe)] King & Foord, 1994. Mineralogy of Maine, Vol.1, p.264.
    • Nevada
      • Eureka Co.
        • Lynn District
    [Jahnsite-(CaMnMg)] NBMG Spec. Pub. 31 Minerals of Nevada
    • New Hampshire
      • Grafton Co.
        • Groton
    [Jahnsite-(CaMnFe)] Moore and Ito (1978), Mineralogical Magazine: 42: 309-323 [316].
    [Jahnsite-(CaMnFe)] NIZAMOFF, James W., SIMMONS, William B., and FALSTER, Alexander U. (2004) PHOSPHATE MINERALOGY AND PARAGENESIS OF THE PALERMO #2 PEGMATITE, NORTH GROTON, NEW HAMPSHIRE Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 115
    [Jahnsite-(CaMnFe)] Journal of Pegmatology vol. 1, no. 1
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    [Jahnsite-(CaMnFe)]
    • South Dakota
      • Custer Co.
        • Custer District
          • Custer
    [Jahnsite-(CaMnMn)] Tony Nikischer;
          • Fourmile
    [Jahnsite-(CaMnFe)] Thomas A. Loomis & Thomas J. Campbell (2002) The Tip Top pegmatite A Historical Review and Mineralogical Update MATRIX Vol. 10, No. 3
      • Pennington Co.
        • Keystone District
          • Keystone
    [Jahnsite-(CaMnMg)] Rocks & Minerals: 67(6): 380-388.
    Mineral and/or Locality
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