Jahnsite-(CaMnFe)
A valid IMA mineral species
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About Jahnsite-(CaMnFe)
Richard H. Jahns
Formula:
{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Colour:
Brown, golden brown, purplish brown, yellow, yellow-orange
Lustre:
Sub-Adamantine, Sub-Vitreous, Resinous
Hardness:
4
Specific Gravity:
2.86
Crystal System:
Monoclinic
Member of:
Name:
Named in 1974 by Paul (Paulus) Brian Moore and Takaharu Araki in honor of Richard Henry Jahns (March 10, 1915 Los Angeles, California, USA - December 31, 1983 Palo Alto, California, USA), mineralogist and pegmatite expert, Stanford University, Palo Alto, California, USA. The suffix indicates metal site occupancies.
Type Locality:
Unique Identifiers
Mindat ID:
2066
Long-form identifier:
mindat:1:1:2066:0
GUID
(UUID V4):
(UUID V4):
b7468963-eec8-4a52-96bf-f5b6de4388a4
IMA Classification of Jahnsite-(CaMnFe)
Approved
IMA status notes:
Redefined by the IMA
IMA Formula:
CaMn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2O
Approval year:
1978
Approval history:
1978: Redefined by IMA by special procedure.
Classification of Jahnsite-(CaMnFe)
8.DH.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
42.11.2.2
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
19.12.41
19 : Phosphates
12 : Phosphates of Mn
19 : Phosphates
12 : Phosphates of Mn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Jah-CaMnFe | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Jhn | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Jahnsite-(CaMnFe)
Sub-Adamantine, Sub-Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Brown, golden brown, purplish brown, yellow, yellow-orange
Streak:
White
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {001}
Good on {001}
Density:
2.86 g/cm3 (Measured) 2.88 g/cm3 (Calculated)
Optical Data of Jahnsite-(CaMnFe)
Type:
Biaxial (-)
RI values:
nα = 1.682 nβ = 1.695 nγ = 1.707
Birefringence:
0.025
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
X = pale yellow brown, Y = yellow brown, Z = dark yellow brown
Chemistry of Jahnsite-(CaMnFe)
Mindat Formula:
{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Crystallography of Jahnsite-(CaMnFe)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/a
Cell Parameters:
a = 15.01 Å, b = 7.15 Å, c = 9.87 Å
β = 111.23°
β = 111.23°
Ratio:
a:b:c = 2.099 : 1 : 1.38
Unit Cell V:
987.38 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.150 Å | (100) |
| 4.961 Å | (25) |
| 4.602 Å | (40) |
| 3.483 Å | (30) |
| 3.451 Å | (30) |
| 2.808 Å | (55) |
| 1.874 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Jahnsite-(CaMnFe)
General Appearance of Type Material:
Brown striated tablets in clusters
Geological Setting of Type Material:
Late stage phosphate mineralization in granite pegmatite.
Reference:
Moore P. B., Ito J (1978) I. Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series. II. New data on xanthoxenite. III. Salmonsite discredited. Mineralogical Magazine. 42: 309-323.
Other Language Names for Jahnsite-(CaMnFe)
German:Jahnsit-(CaMnFe)
Russian:Джансит-(CaMnFe)
Relationship of Jahnsite-(CaMnFe) to other Species
Member of:
Other Members of this group:
| Jahnsite-(CaFeFe) | {Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. |
| Jahnsite-(CaFeMg) | CaFe2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(CaMnZn) | CaMn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(MnMnFe) | Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(MnMnMg) | Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(MnMnMn) | {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P21/b |
| Jahnsite-(MnMnZn) | Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(NaFeMg) | NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Jahnsite-(NaMnMn) | NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
| Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O | Mon. 2/m : P2/b |
Common Associates
Associated Minerals Based on Photo Data:
| 11 photos of Jahnsite-(CaMnFe) associated with Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
| 11 photos of Jahnsite-(CaMnFe) associated with Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
| 9 photos of Jahnsite-(CaMnFe) associated with Rockbridgeite | Fe2+Fe3+4(PO4)3(OH)5 |
| 9 photos of Jahnsite-(CaMnFe) associated with Leucophosphite | KFe3+2(PO4)2(OH) · 2H2O |
| 5 photos of Jahnsite-(CaMnFe) associated with Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O |
| 4 photos of Jahnsite-(CaMnFe) associated with Phosphosiderite | FePO4 · 2H2O |
| 4 photos of Jahnsite-(CaMnFe) associated with Variscite | AlPO4 · 2H2O |
| 4 photos of Jahnsite-(CaMnFe) associated with Whitlockite | Ca9Mg(PO4)6(PO3OH) |
| 4 photos of Jahnsite-(CaMnFe) associated with Johnsomervilleite | Na3CaFe11(PO4)9 |
| 4 photos of Jahnsite-(CaMnFe) associated with Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DH. | Ferroberaunite | Fe2+Fe3+5(PO4)4(OH)5 · 6H2O |
| 8.DH. | Rowleyite | [Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl] |
| 8.DH. | Ammoniotinsleyite | (NH4)Al2(PO4)2(OH) · 2H2O |
| 8.DH. | Thebaite-(NH4) | (NH4)3Al(C2O4)(PO3OH)2(H2O) |
| 8.DH. | Dendoraite-(NH4) | (NH4)2NaAl(C2O4)(PO3OH)2(H2O)2 |
| 8.DH. | Whiteite-(MnMnMn) | Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH. | Whiteite-(CaMnFe) | CaMnFe2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH. | Hochleitnerite | Mn2Ti3(PO4)4O2(H2O)2 · 14H2O |
| 8.DH. | Regerite | KFe6(PO4)4(OH)7(H2O)6 · 4H2O |
| 8.DH. | Hydroxylbenyacarite | (H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O |
| 8.DH. | Macraeite | K(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2O |
| 8.DH.05 | Minyulite | KAl2(PO4)2F · 4H2O |
| 8.DH.10 | Leucophosphite | KFe3+2(PO4)2(OH) · 2H2O |
| 8.DH.10 | Spheniscidite | (NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2O |
| 8.DH.10 | Tinsleyite | KAl2(PO4)2(OH) · 2H2O |
| 8.DH.15 | Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O |
| 8.DH.15 | Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMnMg) | {Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(MnFeMg) | {(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnMn) | {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Kaluginite | (Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2O |
| 8.DH.15 | Jahnsite-(CaFeFe) | {Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(NaFeMg) | NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMgMg) | {Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMnMn) | {Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(MnMnMg) | MnMnMg2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnMg) | Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaFeMg) | CaFe2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnFe) | Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMgMg) | CaMg3Al2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnZn) | Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(NaMnMn) | NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMnZn) | CaMn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.20 | Lun'okite | (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O |
| 8.DH.20 | Manganosegelerite | (Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2O |
| 8.DH.20 | Overite | CaMgAl(PO4)2(OH) · 4H2O |
| 8.DH.20 | Segelerite | Ca2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.20 | Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O |
| 8.DH.20 | Juonniite | CaMgSc(PO4)2(OH) · 4H2O |
| 8.DH.25 | Calcioferrite | Ca2Fe3+2(PO4)3(OH) · 7H2O |
| 8.DH.25 | Kingsmountite | Ca3MnFeAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Zodacite | Ca4Mn2+Fe3+4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Fanfaniite | Ca4MnAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.30 | Arseniosiderite | Ca2Fe3+3(AsO4)3O2 · 3H2O |
| 8.DH.30 | Kolfanite | Ca2Fe3+3O2(AsO4)3 · 2H2O |
| 8.DH.30 | Mitridatite | Ca2Fe3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Pararobertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Sailaufite | (Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2O |
| 8.DH.35 | Mantienneite | KMg2Al2Ti(PO4)4(OH)3 · 15H2O |
| 8.DH.35 | Paulkerrite | K(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2O |
| 8.DH.35 | Benyacarite | (H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2O |
| 8.DH.40 | Xanthoxenite | Ca4Fe3+2(PO4)4(OH)2 · 3H2O |
| 8.DH.45 | Mahnertite | NaCu3(AsO4)2Cl · 5H2O |
| 8.DH.50 | Andyrobertsite | KCdCu5(AsO4)4(H2AsO4) · 2H2O |
| 8.DH.50 | Calcioandyrobertsite | KCaCu5(AsO4)4(H2AsO4) · 2H2O |
| 8.DH.55 | Englishite | K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O |
| 8.DH.60 | Bouazzerite | Bi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2O |
| 8.DH.65 | Galliskiite | Ca4Al2(PO4)2F8 · 5H2O |
| 8.DH.70 | Joteite | Ca2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2O |
| 8.DH.75 | Kampelite | Ba6Mg3Sc8(PO4)12(OH)6 · 7H2O |
| 8.DH.80 | Kapundaite | NaCaFe4(PO4)4(OH)3 · 5H2O |
| 8.DH.85 | Vaniniite | Ca2Mn2+3Mn3+2O2(AsO4)4 · 2H2O |
Fluorescence of Jahnsite-(CaMnFe)
Not Fluorescent in UV
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.
Internet Links for Jahnsite-(CaMnFe)
mindat.org URL:
https://www.mindat.org/min-2066.html
Please feel free to link to this page.
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References for Jahnsite-(CaMnFe)
Reference List:
Moore, Paul Brian, Araki, and Takaharu (1974) Jahnsite, CaMn2+Mg2(H2O)8Fe3+2(OH)2[PO4]4: A novel stereoisomerism of ligands about octahedral corner-chains. American Mineralogist, 59 (9-10) 964-973
Moore, Paul Brian, Ito, Jun (1978) I. Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series. II. New data on xanthoxenite. III. Salmonsite discredited. Mineralogical Magazine, 42 (323) 309-323 doi:10.1180/minmag.1978.042.323.01
Localities for Jahnsite-(CaMnFe)
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Galliski et al. (2020) |
Brazil | |
| Cassedanne et al. (1999) |
Europe | |
| Berbain et al. (2012) | |
Finland | |
| Sandström et al. (2009) |
France | |
| Hatert et al. (2020) |
| Berbain et al. (2012) |
| Berbain et al. (2012) |
Germany | |
| Christian Rewitzer collection (analysed by EPMA and Moessbauer spectroscopy) |
| ex.coll. Kastning | |
Italy | |
| VIGNOLA et al. (2007) |
| Vignola et al. (2011) | |
| Vignola P. et al. (2011) |
| Vignola et al. (2018) |
Morocco | |
| FRANSOLET (1987) |
| Favreau (2012) |
Poland | |
| Włodek et al. (2015) |
Portugal | |
| Alves et al. (2012) |
| Pedro Alves collection and analytical ... |
| Pedro Alves collection and analytical ... |
| e-rocks.com (n.d.) | |
| Pedro Alves collection and analytical ... |
| Identified in Rebentão Mine |
| Pedro Alves collection and analytical ... |
Russia | |
| Rruff specimen R070733 |
Spain | |
| Calvo (2015) |
| Garate-Olave et al. (2020) |
| Calvo Rebollar (2015) |
Switzerland | |
| Stalder et al. (1998) |
USA | |
| King et al. (1994) +1 other reference |
| King et al. (1994) +1 other reference | |
| |
| King et al. (1994) |
| Moore et al. (1978) |
| Nizamoff et al. (2004) | |
| Journal of Pegmatology vol. 1 +2 other references | |
| |
| Thomas A. Loomis & Thomas J. Campbell (2002) |
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Assunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal