Jahnsite-(MnMnMg) (original) (raw)
A valid IMA mineral species
About Jahnsite-(MnMnMg)Hide
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Formula:
Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O
Colour:
Yellow to honey-colored or greenish-yellow
Specific Gravity:
2.625 (Calculated)
Crystal System:
Monoclinic
Name:
The root name is 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.
This page provides mineralogical data about Jahnsite-(MnMnMg).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:43541:5
dad81613-c1c6-43e4-a3f4-bb962feaa099
IMA Classification of Jahnsite-(MnMnMg)Hide
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Type description reference:
Vignola, Pietro, Hatert, Frédéric, Baijot, Maxime, Rotiroti, Nicola, Risplendente, Andrea, Varvello, Sergio (2019) Jahnsite-(MnMnMg), Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2·8H2O, a new phosphate mineral species from Sapucaia pegmatite, Sapucaia Do Norte, Galiléia, Minas Gerais, Brazil. The Canadian Mineralogist, 57 (3) 363-370 doi:10.3749/canmin.1800078
Classification of Jahnsite-(MnMnMg)Hide
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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
Mineral SymbolsHide
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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.
| Symbol | Source | Reference |
|---|---|---|
| Jah-MnMnMg | 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-(MnMnMg)Hide
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Colour:
Yellow to honey-colored or greenish-yellow
Cleavage:
Distinct/Good
{001}
Fracture:
Irregular/Uneven
Density:
2.625 g/cm3 (Calculated)
Optical Data of Jahnsite-(MnMnMg)Hide
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RI values:
_n_α = 1.616 _n_β = 1.619 _n_γ = 1.656
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of Jahnsite-(MnMnMg)Hide
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Mindat Formula:
Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O
Crystallography of Jahnsite-(MnMnMg)Hide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 15.177(2) Å, b = 7.176(1) Å, c = 10.006(3) Å
β = 111.01(2)°
Ratio:
a:b:c = 2.115 : 1 : 1.394
Unit Cell V:
1,017.31 ų (Calculated from Unit Cell)
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.28 Å | (100) |
| 4.945 Å | (39) |
| 4.627 Å | (20) |
| 3.521 Å | (43) |
| 2.988 Å | (52) |
| 2.842 Å | (81) |
| 1.958 Å | (27) |
| 1.581 Å | (27) |
Geological EnvironmentHide
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Type Occurrence of Jahnsite-(MnMnMg)Hide
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General Appearance of Type Material:
It forms prisms weakly elongated along a, flattened on [010], and twinned by reflection on {001} up to 200 μm in length.
Place of Conservation of Type Material:
mineralogical collections of the Laboratoire de Minéralogie, University of Liege, Bât. B18, Sart Tilman, B-4000 Liège, Belgium, catalogue no. 21140
Associated Minerals at Type Locality:
Reference:
Vignola, P., Hatert, F., Baijot, M., Rotiroti, N., Risplendente, A., & Varvello, S. (2019). Jahnsite-(MnMnMg), Mn2+ Mn2+ Mg2+ 2Fe3+ 2 (PO4) 4 (OH) 2· 8H2O, a New Phosphate Mineral Species from Sapucaia Pegmatite, Sapucaia Do Norte, Galiléia, Minas Gerais, Brazil. The Canadian Mineralogist, 57(3), 363-370.
Relationship of Jahnsite-(MnMnMg) to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 8.DH. | Ferroberaunite | Fe2+Fe3+5(PO4)4(OH)5 · 6H2O | Mon. 2/m : _B_2/b |
|---|---|---|---|
| 8.DH. | Rowleyite | [Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl] | Iso. |
| 8.DH. | Ammoniotinsleyite | (NH4)Al2(PO4)2(OH) · 2H2O | Mon. 2/m : _P_21/m |
| 8.DH. | Thebaite-(NH4) | (NH4)3Al(C2O4)(PO3OH)2(H2O) | Mon. 2/m : _P_21/b |
| 8.DH. | Dendoraite-(NH4) | (NH4)2NaAl(C2O4)(PO3OH)2(H2O)2 | Mon. 2/m |
| 8.DH. | Whiteite-(MnMnMn) | Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH. | Whiteite-(CaMnFe) | CaMnFe2Al2(PO4)4(OH)2 · 8H2O | Mon. 2/m |
| 8.DH. | Hochleitnerite | Mn2Ti3(PO4)4O2(H2O)2 · 14H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH. | Regerite | KFe6(PO4)4(OH)7(H2O)6 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DH.05 | Minyulite | KAl2(PO4)2F · 4H2O | Orth. m _m_2 : P b _a_2 |
| 8.DH.10 | Leucophosphite | KFe3+2(PO4)2(OH) · 2H2O | Mon. 2/m : _P_21/b |
| 8.DH.10 | Spheniscidite | (NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2O | Mon. 2/m |
| 8.DH.10 | Tinsleyite | KAl2(PO4)2(OH) · 2H2O | Mon. |
| 8.DH.15 | Jahnsite-(CaMnFe) | {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_21/b |
| 8.DH.15 | Whiteite-(CaMnMg) | {Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m |
| 8.DH.15 | Whiteite-(MnFeMg) | {(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_21/b |
| 8.DH.15 | Jahnsite-(MnMnMn) | {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_21/b |
| 8.DH.15 | Kaluginite | (Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2O | Orth. |
| 8.DH.15 | Jahnsite-(CaFeFe) | {Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. |
| 8.DH.15 | Jahnsite-(NaFeMg) | NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 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 | Mon. 2/m : _P_2/b |
| 8.DH.15 | Whiteite-(MnMnMg) | MnMnMg2Al2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(CaFeMg) | CaFe2+Mg2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(MnMnFe) | Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Whiteite-(CaMgMg) | CaMg3Al2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(MnMnZn) | Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(NaMnMn) | NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.15 | Jahnsite-(CaMnZn) | CaMn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2O | Mon. 2/m : _P_2/b |
| 8.DH.20 | Lun'okite | (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.20 | Manganosegelerite | (Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.20 | Overite | CaMgAl(PO4)2(OH) · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.20 | Segelerite | Ca2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P c c a |
| 8.DH.20 | Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.20 | Juonniite | CaMgSc(PO4)2(OH) · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.25 | Calcioferrite | Ca2Fe3+2(PO4)3(OH) · 7H2O | Mon. 2/m : _B_2/b |
| 8.DH.25 | Kingsmountite | Ca3MnFeAl4(PO4)6(OH)4 · 12H2O | Tric. 1 : _P_1 |
| 8.DH.25 | Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O | Mon. 2 : _B_2 |
| 8.DH.25 | Zodacite | Ca4Mn2+Fe3+4(PO4)6(OH)4 · 12H2O | Mon. |
| 8.DH.25 | Fanfaniite | Ca4MnAl4(PO4)6(OH)4 · 12H2O | Mon. 2/m : _B_2/b |
| 8.DH.30 | Arseniosiderite | Ca2Fe3+3(AsO4)3O2 · 3H2O | Mon. 2/m : _B_2/b |
| 8.DH.30 | Kolfanite | Ca2Fe3+3O2(AsO4)3 · 2H2O | Mon. |
| 8.DH.30 | Mitridatite | Ca2Fe3+3(PO4)3O2 · 3H2O | Mon. 2/m : _B_2/b |
| 8.DH.30 | Pararobertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. 2/m : _P_21/b |
| 8.DH.30 | Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. m : B b |
| 8.DH.30 | Sailaufite | (Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2O | Mon. m : B m |
| 8.DH.35 | Mantienneite | KMg2Al2Ti(PO4)4(OH)3 · 15H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.35 | Paulkerrite | K(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2O | Mon. m |
| 8.DH.35 | Benyacarite | (H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.35 | Hydroxylbenyacarite | (H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.DH.35 | Macraeite | K(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2O | Mon. 2/m : _P_21/b |
| 8.DH.35 | Sperlingite | (H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)] · 4H2O | Mon. 2/m : _P_21/b |
| 8.DH.40 | Xanthoxenite | Ca4Fe3+2(PO4)4(OH)2 · 3H2O | Tric. 1 : _P_1 |
| 8.DH.45 | Mahnertite | NaCu3(AsO4)2Cl · 5H2O | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_4/m m m |
| 8.DH.50 | Andyrobertsite | KCdCu5(AsO4)4(H2AsO4) · 2H2O | Mon. 2/m : _P_21/m |
| 8.DH.50 | Calcioandyrobertsite | KCaCu5(AsO4)4(H2AsO4) · 2H2O | Mon. 2/m : _P_21/m |
| 8.DH.55 | Englishite | K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O | Mon. 2/m |
| 8.DH.60 | Bouazzerite | Bi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2O | Mon. 2/m |
| 8.DH.65 | Galliskiite | Ca4Al2(PO4)2F8 · 5H2O | Tric. 1 : _P_1 |
| 8.DH.70 | Joteite | Ca2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2O | Tric. 1 : _P_1 |
| 8.DH.75 | Kampelite | Ba6Mg3Sc8(PO4)12(OH)6 · 7H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.DH.80 | Kapundaite | NaCaFe4(PO4)4(OH)3 · 5H2O | Tric. 1 : _P_1 |
| 8.DH.85 | Vaniniite | Ca2Mn2+3Mn3+2O2(AsO4)4 · 2H2O | Mon. 2/m : _P_21/b |
Fluorescence of Jahnsite-(MnMnMg)Hide
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Other InformationHide
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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-(MnMnMg)Hide
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References for Jahnsite-(MnMnMg)Hide
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Reference List:
Vignola, Pietro, Hatert, Frédéric, Baijot, Maxime, Rotiroti, Nicola, Risplendente, Andrea, Varvello, Sergio (2019) Jahnsite-(MnMnMg), Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2·8H2O, a new phosphate mineral species from Sapucaia pegmatite, Sapucaia Do Norte, Galiléia, Minas Gerais, Brazil. The Canadian Mineralogist, 57 (3) 363-370 doi:10.3749/canmin.1800078
Localities for Jahnsite-(MnMnMg)Hide
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This 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.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Brazil | |
|---|---|
| Minas Gerais Conselheiro Pena Barra do Cuieté ⓘ Eduardo claim | Sergio Varvello collection |
| Galiléia Sapucaia do Norte ⓘ Sapucaia mine (TL) | Baijot et al. (2012) |