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Jahnsite-(NaFeMg)

A valid IMA mineral species
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03842870017272471328160.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
06792390017272471326979.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
01319790017272016688700.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
03842870017272471328160.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
07848190017272016612066.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
07978760017272016631165.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
03842870017272471328160.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
07848190017272016612066.jpg
Jahnsite-(NaFeMg), etc.

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
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About Jahnsite-(NaFeMg)Hide

01661380017271924193753.jpg
Richard H. Jahns
Formula:
{Na}{Fe3+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Colour:
yellow, orange-red
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.58
Crystal System:
Monoclinic
Name:
For the mineral jahnsite and its sodium, iron and magnesium content.

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.
Jahnsite Group.


Unique IdentifiersHide

Mindat ID:
31994
Long-form identifier:
mindat:1:1:31994:0

Similar NamesHide

JahnsiteA synonym of Jahnsite Subgroup
Jahnsite-(CaFeFe)Valid as an unnamed mineral{Ca}{Fe2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaFeMg)A valid IMA mineral species{Ca}{Fe2+}{Mg2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMgMg)Valid as an unnamed mineral{Ca}{Mg}{Mg2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnFe)A valid IMA mineral species{Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnMg)A valid IMA mineral species{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnMn)A valid IMA mineral species{Ca}{Mn2+}{Mn22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnZn)A valid IMA mineral species{Ca}{Mn2+}{Zn2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(MnMnFe)A valid IMA mineral species{Mn2+}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(MnMnMg)A valid IMA mineral species{Mn2+}{Mn2+}{Mg2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(MnMnMn)A valid IMA mineral species{Mn2+}{Mn2+}{Mn22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(MnMnZn)A valid IMA mineral species{Mn2+}{Mn2+}{Zn2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(NaMnMg)A valid IMA mineral species{(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Jahnsite-(NaMnMn)A valid IMA mineral species{Na}{Mn2+}{(Mn2+,Fe3+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
JanositeA synonym of Copiapite
JonesiteA valid IMA mineral speciesBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O

Classification of Jahnsite-(NaFeMg)Hide

04249070017684452162373.jpg
The jahnsite structure archetype

The structure archetype of jahnsite group minerals, which includes the jahnsite and whiteite subgroups.

IMA Classification of Jahnsite-(NaFeMg)Hide

IMA status:
Approved
IMA Formula:
NaFe3+Mg2Fe3+2(PO4)4(OH)2·8H2O
Approval year:
2007
Strunz-mindat (2026):
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
Dana 8th ed.:
42.11.2.6

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O

Mineral SymbolsHide

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.

SymbolSourceReference for Standard
Jah-NaFeMgIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
JhnThe 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-(NaFeMg)Hide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Yellow, orange-red
Comment:
orange-red bands near their terminations
Streak:
White
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{001}
Fracture:
Splintery
Density:
2.58(2) g/cm3 (Measured)    2.608 g/cm3 (Calculated)

Optical Data of Jahnsite-(NaFeMg)Hide

Type:
Biaxial (-)
RI values:
nα = 1.632(1) nβ = 1.669(1) nγ = 1.671(1)
2V:
Measured: 25° (5), Calculated: 26°
Max. Birefringence:
δ = 0.039
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate
Dispersion:
r > v, very strong
Pleochroism:
Visible
Comments:
X = colorless, Y and Z = beige; Y = Z > X.

Chemistry of Jahnsite-(NaFeMg)Hide

Mindat Formula:
{Na}{Fe3+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Element Weights:
Element% weight
O52.184 %
Fe21.017 %
P15.542 %
Mg6.098 %
Na2.884 %
H2.276 %

Calculated from ideal end-member formula.
Elements listed:
Fe, H, Mg, Na, O, P - search for minerals with similar chemistry

Crystallography of Jahnsite-(NaFeMg)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/a
Cell Parameters:
a = 15.0811(16) Å, b = 7.1403(8) Å, c = 9.8299(11) Å
β = 110.445(1)°
Ratio:
a:b:c = 2.112 : 1 : 1.377
Unit Cell V:
991.84 ų (Calculated from Unit Cell)
Z:
2
Twinning:
simple contact and polysynthetic by reflection on {001}. The twinning combines with the prism forms {011} and {001} and the terminal form {100} to yield six-sided pseudo-orthorhombic prisms with shallow wedge-like terminations

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004587Jahnsite-(NaFeMg)Kampf A R, Steele I M, Loomis T A (2008) Jahnsite-(NaFeMg), a new mineral from the Tip Top mine, Custer County, South Dakota: Description and crystal structure American Mineralogist 93 940-9452008Tip Top mine, Custer County, South Dakota0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.218 Å(100)
4.884 Å(25)
3.537 Å(25)
2.973 Å(25)
2.854 Å(20)
2.819 Å(70)
2.593 Å(25)
1.933 Å(20)
Locality:
Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Type Occurrence of Jahnsite-(NaFeMg)Hide

Type Locality:
ⓘ Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
General Appearance of Type Material:
prismatic along [100]
Place of Conservation of Type Material:
mineral collection of the Natural History Museum of Los Angeles County (catalog numbers 58590, 58591, and 58592).
Geological Setting of Type Material:
highly altered and oxidized triphylite pod from pegmatite
Associated Minerals at Type Locality:
BarbosaliteDufréniteHeterositeLeucophosphiteMitridatite
RockbridgeiteUshkovite

Synonyms of Jahnsite-(NaFeMg)Hide

Other Language Names for Jahnsite-(NaFeMg)Hide

Relationship of Jahnsite-(NaFeMg) to other SpeciesHide

Member of:
Jahnsite Subgroup > Jahnsite Group
Other Members of Jahnsite Subgroup:
'Jahnsite-(CaFeFe)'{Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
Jahnsite-(CaFeMg){Ca}{Fe2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
'Jahnsite-(CaMgMg)'{Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(CaMnZn){Ca}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(MnMnFe){Mn2+}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(MnMnMg){Mn2+}{Mn2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
Jahnsite-(MnMnZn){Mn2+}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
Jahnsite-(NaMnMn){Na}{Mn2+}{(Mn2+,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b

Common AssociatesHide

Associations Based on Photo Data:
7 photos of Jahnsite-(NaFeMg) associated with Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
3 photos of Jahnsite-(NaFeMg) associated with 'Jahnsite-(CaMgMg)'{Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
3 photos of Jahnsite-(NaFeMg) associated with Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
2 photos of Jahnsite-(NaFeMg) associated with MesseliteCa2Fe2+(PO4)2 · 2H2O

Related Minerals - Strunz-mindat GroupingHide

8.DH.Thebaite-(NH4)(NH4)3Al(C2O4)(PO3OH)2(H2O)Mon. 2/m : P21/b
8.DH.Whiteite-(MnMnMn)Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.Ammoniotinsleyite(NH4)Al2(PO4)2(OH) · 2H2OMon. 2/m : P21/m
8.DH.Bergbauerite(H2O)2Mn2(Fe2Ti)(PO4)4(OH)2(H2O)10 · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.Dendoraite-(NH4)(NH4)2NaAl(C2O4)(PO3OH)2(H2O)2Mon. 2/m
8.DH.Rowleyite[Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl]Iso.
8.DH.HochleitneriteMn2Ti3(PO4)4O2(H2O)2 · 14H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.Whiteite-(CaMnFe)CaMnFe2Al2(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.05MinyuliteKAl2(PO4)2F · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon. 2/m
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMn){Na}{Mn2+}{(Mn2+,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(MnMnMg)MnMnMg2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnZn){Ca}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnMg){Mn2+}{Mn2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnFe){Mn2+}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15'Jahnsite-(CaFeFe)'{Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15'Jahnsite-(CaMgMg)'{Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(MnMnZn){Mn2+}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMgMg)CaMg3Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15'Kaluginite'(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeMg){Ca}{Fe2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMnMn){Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm(2/m2/m2/m) : Pcca
8.DH.20Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.25CalcioferriteCa4MgFe3+4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.25FanfaniiteCa4Mn2+Al4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3Mn2+FeAl4(PO4)6(OH)4 · 12H2OTric. 1 : P1
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30Sailaufite(Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon. m : Bm
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.35Sperlingite (H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)] · 4H2OMon. 2/m : P21/b
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OMon. m
8.DH.35Hydroxylbenyacarite(H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O Orth. mmm(2/m2/m2/m) : Pbca
8.DH.35MacraeiteK(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2OMon. 2/m : P21/b
8.DH.35Benyacarite(H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.35Fluormacraeite [(H2O)K]Mn2(Fe2Ti)(PO4)4(OF)(H2O)10 · 4H2OMon. 2/m : P21/b
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm(4/m2/m2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
8.DH.60BouazzeriteBi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2OMon. 2/m
8.DH.65GalliskiiteCa4Al2(PO4)2F8 · 5H2OTric. 1 : P1
8.DH.70JoteiteCa2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2OTric. 1 : P1
8.DH.75KampeliteBa6Mg3Sc8(PO4)12(OH)6 · 7H2OOrth. mmm(2/m2/m2/m) : Pnma
8.DH.80KapundaiteNaCaFe4(PO4)4(OH)3 · 5H2OTric. 1 : P1
8.DH.85VaniniiteCa2Mn2+3Mn3+2O2(AsO4)4 · 2H2OMon. 2/m : P21/b

Other InformationHide

Notes:
Crystals slowly dissolve in cold dilute HCl
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-(NaFeMg)Hide

References for Jahnsite-(NaFeMg)Hide

Localities for Jahnsite-(NaFeMg)Hide

Showing 5 localities.

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.
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Locality ListHide

- 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.
Australia
 
  • South Australia
    • Light Regional Council
      • Koonunga
Peter Elliott
    • Pastoral Unincorporated Area
      • Bimbowrie Conservation Park
        • Old Boolcoomata Station
          • White Rock Feldspar Mine
Elliott (2022) +1 other reference
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lophos
          • Agrileza mines
Vrtiška et al. (2025)
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Amerzgane Cercle
        • Ouisselsate Caïdat
Kampf et al. (2012)
USA (TL)
 
  • South Dakota
    • Custer County
      • Custer Mining District
        • Fourmile
Kampf et al. (2008)
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