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Mahnertite

A valid IMA mineral species
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08607830014951833909171.jpg
Mahnertite

Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-CĂ´te d'Azur, France
04139890014977675156396.jpg
Mahnertite

Fenugu Sibiri Mine, Gonnosfanadiga, South Sardinia Province, Sardinia, Italy
06005190015530703899833.jpg
Mahnertite

Brachbach, Kirchen, Altenkirchen, Rhineland-Palatinate, Germany
07877210014949563795172.jpg
Mahnertite

Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-CĂ´te d'Azur, France
03989900014948225074424.jpg
Mahnertite

Fenugu Sibiri Mine, Gonnosfanadiga, South Sardinia Province, Sardinia, Italy
00941080015523543981979.jpg
Mahnertite

Brachbach, Kirchen, Altenkirchen, Rhineland-Palatinate, Germany
08607830014951833909171.jpg
Mahnertite

Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-CĂ´te d'Azur, France
04139890014977675156396.jpg
Mahnertite

Fenugu Sibiri Mine, Gonnosfanadiga, South Sardinia Province, Sardinia, Italy
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About MahnertiteHide

09222070015706848005069.jpg
Volker Mahnert
Formula:
NaCu3(AsO4)2Cl ¡ 5H2O
Colour:
Blue to emerald green.
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
3.33
Crystal System:
Tetragonal
Name:
Named after Volker Mahnert (3 December 1943, Innsbruck, Austria - 23 November 2018, Geneva, Switzerland), zoologist, Director of the Muséum d’Histoire Naturelle, Geneva, Switzerland.
Structurally related to Zdenekite and other members of the Lavendulan Group.



Unique IdentifiersHide

Mindat ID:
7165
Long-form identifier:
mindat:1:1:7165:5
GUID
(UUID V4):
2f6cac79-8407-4c9a-b9fe-e67b987bb8c8

IMA Classification of MahnertiteHide

Classification of MahnertiteHide

Strunz-mindat (2024):
8.DH.45

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

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
MahIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of MahnertiteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Blue to emerald green.
Streak:
Pale blue
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
{001}
Fracture:
Irregular/Uneven
Density:
3.33(2) g/cm3 (Measured)    3.36(1) g/cm3 (Calculated)

Optical Data of MahnertiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.686(2) nε = 1.635(2)
Max Birefringence:
δ = 0.051
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
O = blue to intense green-blue, E = clear blue to clear green.

Chemistry of MahnertiteHide

Mindat Formula:
NaCu3(AsO4)2Cl ¡ 5H2O
Elements listed:
As, Cl, Cu, H, Na, O - search for minerals with similar chemistry

Crystallography of MahnertiteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Cell Parameters:
a = 10.037 Å, c = 23.739 Å
Ratio:
a:c = 1 : 2.365
Unit Cell V:
2391.5 ų
Z:
8
Morphology:
Thin tetragonal plates. Tabular on {001}, also showing {100}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007079MahnertitePushcharovsky D Y, Zubkova N V, Teat S J, Maclean E J, Sarp H (2004) Crystal structure of mahnertite European Journal of Mineralogy 16 687-69220040293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.90 Å(100)
9.29 Å(60)
7.131 Å(50)
5.043 Å(60)
4.641 Å(40)
3.098 Å(80)
3.061 Å(70)

Geological EnvironmentHide

Type Occurrence of MahnertiteHide

Type Locality:
ⓘ Cap Garonne Mine, Le Pradet, Toulon, Var, Provence-Alpes-Côte d'Azur, France
General Appearance of Type Material:
Blue to emerald green aggregates of thin (0.1 mm) square crystals, and as spherules to 0.2 mm in diameter.
Place of Conservation of Type Material:
Natural History Museum, Geneva, Switzerland.
Geological Setting of Type Material:
Oxidation product in a sedimentary-hosted copper deposit.
Associated Minerals at Type Locality:
Tennantite SubgroupCovelliteGeminitePushcharovskiteQuartz
Reference:
Sarp, H. (1996) Mahnertite, (Na,Ca)Cu(AsO4)4Cl.5H2O, a new mineral from the Cap Garonne Mine, Var France. Archs. Sci. Genève: 49(2): 119-124
Download:
https://rruff.info/rruff_1.0/uploads/ASG49_119.pdf

Synonyms of MahnertiteHide

Other Language Names for MahnertiteHide

Relationship of Mahnertite to other SpeciesHide

Structurally related to group(s):
Lavendulan GroupMahnertite, richelsdorfite, andyrobertsite and calcioandyrobertsite are structurally ...

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Mahnertite associated with ZdenĕkiteNaPbCu5(AsO4)4Cl · 5H2O
2 photos of Mahnertite associated with CaracoliteNa3Pb2(SO4)3Cl
1 photo of Mahnertite associated with ScoroditeFe3+AsO4 ¡ 2H2O
1 photo of Mahnertite associated with CarminitePbFe3+2(AsO4)2(OH)2
1 photo of Mahnertite associated with BeudantitePbFe3(AsO4)(SO4)(OH)6
1 photo of Mahnertite associated with JuansilvaiteNa5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2 ¡ 4H2O

Related Minerals - Strunz-mindat GroupingHide

8.DH.FerroberauniteFe2+Fe3+5(PO4)4(OH)5 ¡ 6H2OMon. 2/m : B2/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) ¡ 2H2OMon. 2/m : P21/m
8.DH.Thebaite-(NH4)(NH4)3Al(C2O4)(PO3OH)2(H2O)Mon. 2/m : P21/b
8.DH.Dendoraite-(NH4)(NH4)2NaAl(C2O4)(PO3OH)2(H2O)2Mon. 2/m
8.DH.Whiteite-(MnMnMn)Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.Whiteite-(CaMnFe)CaMnFe2Al2(PO4)4(OH)2 ¡ 8H2OMon. 2/m
8.DH.HochleitneriteMn2Ti3(PO4)4O2(H2O)2 ¡ 14H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.RegeriteKFe6(PO4)4(OH)7(H2O)6 ¡ 4H2OMon. 2/m : P21/b
8.DH.05MinyuliteKAl2(PO4)2F ¡ 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) ¡ 2H2OMon. 2/m : P21/b
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) ¡ 2H2OMon. 2/m
8.DH.10TinsleyiteKAl2(PO4)2(OH) ¡ 2H2OMon.
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+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.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 ¡ 7H2OMon. 2/m : P2/b
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(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.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) ¡ 4H2OOrth.
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 ¡ 8H2OMon.
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 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.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 ¡ 8H2O
8.DH.15Whiteite-(CaMnMn){Ca}{Mn2+}{Mn2}{Al2}(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-(MnMnMg)Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaFeMg)CaFe2+Mg2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnFe)Mn2+Mn2+Fe2+2Fe3+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.15Jahnsite-(MnMnZn)Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMn)NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnZn)CaMn2+Zn2Fe3+2(PO4)4(OH)2 ¡ 8H2OMon. 2/m : P2/b
8.DH.20Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH ¡ 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) ¡ 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) ¡ 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 ¡ 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) ¡ 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20JuonniiteCaMgSc(PO4)2(OH) ¡ 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.25CalcioferriteCa2Fe3+2(PO4)3(OH) ¡ 7H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3MnFeAl4(PO4)6(OH)4 ¡ 12H2OTric. 1 : P1
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 ¡ 12H2OMon. 2 : B2
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 ¡ 12H2OMon.
8.DH.25FanfaniiteCa4MnAl4(PO4)6(OH)4 ¡ 12H2OMon. 2/m : B2/b
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 ¡ 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 ¡ 2H2OMon.
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 ¡ 3H2OMon. 2/m : B2/b
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 ¡ 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 ¡ 3H2OMon. m : Bb
8.DH.30Sailaufite(Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon. m : Bm
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 ¡ 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 ¡ 15H2OMon. m
8.DH.35Benyacarite(H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 ¡ 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35Hydroxylbenyacarite(H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 ¡ 4H2O Orth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35MacraeiteK(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 ¡ 4H2OMon. 2/m : P21/b
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 ¡ 3H2OTric. 1 : P1
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/m 2/m 2/m) : Pnma
8.DH.80KapundaiteNaCaFe4(PO4)4(OH)3 ¡ 5H2OTric. 1 : P1
8.DH.85VaniniiteCa2Mn2+3Mn3+2O2(AsO4)4 ¡ 2H2OMon. 2/m : P21/b

Fluorescence of MahnertiteHide

In UV light:
Not fluorescent

Other InformationHide

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 MahnertiteHide

References for MahnertiteHide

Localities for MahnertiteHide

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

- 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.
Chile
 
  • TarapacĂĄ
    • Iquique Province
SEM-EDS by Joy Desor
France (TL)
 
  • Provence-Alpes-CĂ´te d'Azur
    • Var
      • Toulon
        • Le Pradet
Jean-Marie Claude collection +1 other reference
Germany
 
  • Rhineland-Palatinate
    • Altenkirchen
      • Kirchen (Sieg)
Joy Desor (SEM-EDS and Raman analyses)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion mining district
          • Agios Konstantinos (Kamariza)
            • Mercati mines
Lapis (7) +1 other reference
Rieck (1999)
Italy
 
  • Sardinia
    • South Sardinia Province
      • Gonnosfanadiga
Desor (2017)
Caboni et al. (2018)
Spain
 
  • Andalusia
    • AlmerĂ­a
      • Cuevas del Almanzora
Calvo Rebollar et al. (2022)
USA
 
  • Utah
    • San Juan County
      • Red Canyon Mining District
Kampf et al. (2018)
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